Deep red, technologically sophisticated, and equipped with two sonic motors: the LELO F2S™ Double Sonic Sonic Masturbator & Stroker – Red combines the motion of a hand-operated stroker with dual sonic stimulation. On either side of the soft silicone interior, two sonic stimulators work together to create wave-like sensations along the penis. With 13 modes, 16 intensity levels, app control, Humanize, and AI Interactive, this F2S™ goes a significant step beyond a traditional masturbator. The red design also makes no secret of the fact that this device is built for pleasure.
With a length of approximately 14 cm, an outer diameter of about 8.2 cm, and a weight of 360 grams, the F2S™ Double Sonic feels sturdy and substantial in your hand. Inside, an extra-soft, flexible silicone sleeve awaits. You control the pace and movement with your hand, while the electronics add a second layer of sonic stimulation. The result is an intriguing hybrid of a premium stroker and smart technology.

Dual Sonic Stimulation

The main difference between the F2S™ Double Sonic and a conventional masturbator lies in the two sonic stimulators. These are positioned on either side of the soft interior and are each powered by their own motor.
Instead of producing only traditional vibrations, they create wave-like stimulation through the silicone material. The operation of both motors changes depending on the selected function and intensity.
This creates a different experience than that of a simple vibrating stroker. The manual movement remains entirely under your control, while the dual motors add their own sonic rhythm to it.

Two Motors Working Together

LELO didn’t simply add an extra motor to pad out the spec sheet. The two motors are designed to build up sonic stimulation from different angles.
This allows for different rhythms and wave-like patterns. The electronic stimulation essentially forms a second layer of movement alongside the pace you set yourself with the stroker.
In other words, it’s a classic masturbator with a serious tech upgrade. And after that upgrade, it turns out one motor just wasn’t enough anymore.

13 different modes

The F2S™ Double Sonic features a total of 13 modes. Eight of these are accessible directly through the device. Another five functions become available when you connect the masturbator to the LELO™ app.
So you don’t have to reach for your phone every time. For quick and easy use, the built-in functions are directly accessible via the physical controls.
If you want to explore the full range of features, the app unlocks more interactive functions, among other things.

16 intensity levels with SmoothRise™

In addition to the different modes, you can choose from no fewer than 16 intensity levels. LELO uses its proprietary SmoothRise™ technology for this.
This technology was developed to make changes in intensity more gradual. Instead of large, abrupt steps, you can more precisely find the level that feels comfortable at that moment.
This is especially useful when you want to build up slowly and explore subtle differences in stimulation. Sixteen levels offer considerably more flexibility than the usual three settings: low, medium, and rocket launch.

Humanize makes the rhythm less predictable

Through the LELO™ app, you gain access to the Humanize mode. This feature introduces slight variations in timing and intensity.
Electronic patterns are normally extremely regular. Humanize deliberately breaks that predictability by making subtle changes to the way the motors operate.
As a result, the stimulation feels less like an endlessly repeating program. It’s precisely these small differences in pace and intensity that give this feature its unique character.

AI Interactive responds to movement

The AI Interactive feature uses Double Sonic’s built-in sensor technology to detect movement. This allows the electronic stimulation to respond to the way you use the stroker.
Your own pace thus becomes part of the experience. If you change your movement, the masturbator’s response can change as well.
This gives the F2S™ Double Sonic a more interactive character than a toy that simply keeps playing a single preset program. You’re not just controlling the device; the device is also paying a little attention to you.

Full control via the LELO™ app

You can connect the red F2S™ Double Sonic to the LELO™ app via Bluetooth. There, you’ll find additional modes and various interactive features.
The app provides access to Humanize, AI Interactive, and training options. This allows you to get significantly more out of the device than with just its built-in functions alone.
The physical controls remain fully available. So your smartphone is an extension of the device’s capabilities, not a mandatory remote control.

Stamina Trainer

The F2S™ Double Sonic can also be used via the app as a Stamina Trainer. The associated features are designed to help you manage arousal more consciously and practice self-control.
Special training routines are available for this purpose, combining stimulation with targeted exercises. This gives the masturbator an additional training function alongside its recreational capabilities.
This makes the Double Sonic remarkably versatile: the same device can be used purely for pleasure one time and be part of a targeted training session the next.

Kegel exercises for men

Guided Kegel exercises are also part of the app’s features. These exercises focus on consciously contracting and relaxing the pelvic floor muscles.
The male pelvic floor plays a role in, among other things, erections, ejaculation control, and urinary control. Targeted training can help you learn to recognize and use these muscles more consciously.
This is a feature you might expect to find in a workout program rather than in a masturbator, but it is precisely this type of combination that fits the technical nature of the F2S™ Double Sonic.

Extra-soft silicone interior

The body-facing part of the Double Sonic is made of extra-soft silicone. The flexible material molds itself around the penis during use while simultaneously transmitting the movements of the sonic stimulators.
The inner opening measures approximately 3.4 to 4.5 cm. Thanks to the silicone’s flexibility, the material can adapt during use.
Use a generous amount of water-based lubricant inside the stroker. This reduces friction and gives the soft silicone the smoothness that is essential for a stroker.

13 cm usable internal length

The F2S™ Double Sonic has a usable internal length of approximately 13 cm. The entire device is about 14 cm long.
The design is intended to be moved by hand along the penis. Therefore, it’s not just about how much of the penis fits completely inside the masturbator, but mainly about the contact and movement of the soft sleeve along the penis.
The outer diameter is approximately 8.2 cm, giving you a sturdy body to hold and ensuring a secure grip while stroking.

You set the pace yourself

The F2S™ Double Sonic is not a masturbation machine that performs autonomous mechanical up-and-down movements. It is a hand-operated stroker.
That means you decide how fast, slow, short, or long your movements are. The two motors simultaneously provide their sonic stimulation.
This combination gives you a lot of control. You don’t have to leave the rhythm entirely up to a motor; instead, you can combine manual movement with electronic stimulation.

Red, black, and premium finish

The red version combines a bold red color with black accents. This gives the Double Sonic a completely different character than the cooler teal version.
While teal looks almost futuristic and technical, red has a warmer and more pronounced look. The shape remains sleek and modern, but this version hides its naughty intentions a little less convincingly.
For its construction, LELO combines body-safe silicone, ABS, and an aluminum alloy. The soft silicone is used where it comes into contact with the body, while the other materials provide sturdiness and a high-quality finish.

360 grams of sturdy technology

The LELO F2S™ Double Sonic weighs approximately 360 grams. This makes it feel significantly more substantial than a simple pocket masturbator.
That weight is consistent with the sturdy casing, dual motors, built-in battery, sensors, and electronics. At approximately 14 cm in length and 8.2 cm in outer diameter, the device remains easy to handle with one hand.
The rounded shape and sturdy exterior provide a secure grip, while the soft interior ensures flexible contact with the body.

USB-rechargeable

Double Sonic features a built-in 3.7 V lithium battery and is charged via USB. This eliminates the need for disposable batteries.
A full charge takes up to approximately 2 hours. With a full battery, the masturbator can be used for up to about 2 hours, depending on the selected intensity and functions.
The standby time is up to approximately 90 days. This means you don’t have to recharge it before every session if you use it only occasionally.

Automatic Shut-Off

After approximately 20 minutes of inactivity, the Double Sonic may automatically shut off. This prevents the battery from draining unnecessarily if the device is accidentally left on.
This is handy when, after use, your attention suddenly shifts to something else entirely.

Relatively Discreet Noise Level

Despite having two motors, the Double Sonic was designed with a focus on relatively quiet operation. The maximum specified noise level is below approximately 60 dB.
The actual noise level may vary depending on the selected intensity, how you hold the stroker, and the environment in which you use it.

Water-resistant design

The F2S™ Double Sonic features a water-resistant design. This allows the soft silicone interior to be thoroughly cleaned after use.
Carefully rinse away any remaining lubricant and, if desired, use a suitable toy cleaner. Then let the device dry completely before storing it or plugging it in to charge.

Tips for Use

Before use, apply a generous amount of water-based lubricant to the soft silicone sleeve and around the opening. Start with a low intensity and a gentle manual pace to get used to the combination of strokes and sonic stimulation.
Then experiment with the sixteen intensity levels and different modes. Also, consciously vary your own pace: moving slowly with more intense sonic stimulation can feel very different from faster strokes at a lower setting.
Connect the Double Sonic to the LELO™ app if you want to explore the interactive features. Humanize and AI Interactive, in particular, add a different dynamic than the built-in programs.

Cleaning and Storage

Clean the LELO F2S™ Double Sonic thoroughly before and after each use. Use lukewarm water and, if desired, a suitable toy cleaner. Thoroughly remove any traces of lubricant from the silicone interior.
Then let the masturbator dry completely. Store it clean and dry in the included satin storage pouch to protect the soft silicone from dust and prolonged contact with other materials.

General Features

• Brand: LELO
• Model: F2S™ Double Sonic
• Type: sonic masturbator and stroker
• Dual sonic stimulation
• Two separate motors
• Two sonic stimulators
• 13 modes in total
• 8 built-in modes
• 5 additional app modes
• 16 intensity levels
• SmoothRise™ technology
• Humanize mode via the LELO™ app
• AI Interactive mode
• Built-in motion sensor
• Stamina Trainer
• Guided Kegel exercises via the app
• Bluetooth connection to the LELO™ app
• Manual stroker motion
• Extra-soft silicone interior
• Materials: body-safe silicone, ABS, and aluminum alloy
• Color: red and black
• Total length: approximately 14 cm
• Usable inner length: approximately 13 cm
• Outer diameter: approximately 8.2 cm
• Inner diameter: approximately 3.4–4.5 cm
• Net weight: approximately 360 g
• USB-rechargeable
• 3.7 V lithium battery
• Charging time: up to approximately 2 hours
• Usage time: up to approximately 2 hours
• Standby time: up to approximately 90 days
• Automatic shut-off after approximately 20 minutes of inactivity
• Maximum noise level: less than 60 dB
• Water-resistant
• Water-based lubricant recommended
• USB charging cable included
• Satin storage pouch included
• User manual included

FAQ

What makes the LELO F2S™ Double Sonic Sonic Masturbator & Stroker Red different from a regular masturbator?
The F2S™ Double Sonic combines manual stroking motion with two motors and two sonic stimulators. It also features 13 modes, 16 intensity levels, motion sensors, and advanced functions via the LELO™ app.
Can the LELO F2S™ Double Sonic Sonic Masturbator & Stroker Red be used without a smartphone?
Yes. Eight modes are available directly through the device. The app is only required for five additional modes and features such as Humanize, AI Interactive, Stamina Trainer, and guided Kegel exercises.
How big is the LELO F2S™ Double Sonic Sonic Masturbator & Stroker Red?
The masturbator is approximately 14 cm long and has an outer diameter of about 8.2 cm. The usable inner length is approximately 13 cm, and the device weighs about 360 grams.
How long does the LELO F2S™ Double Sonic Sonic Masturbator & Stroker Red last on a single charge?
A full charge takes up to approximately 2 hours. A fully charged battery provides up to approximately 2 hours of use. Actual runtime may vary depending on the selected functions and intensity.
The red LELO F2S™ Double Sonic combines a soft, handheld stroker with two sonic motors, sixteen intensity levels, and smart features that respond to your movements. Premium technology in a bold red design that makes no attempt to hide its purpose. Your order will be carefully packaged and shipped quickly and completely discreetly.