F2S Double Sonic AI-Responsive Stroker by LELO

The F2S Double Sonic AI-Responsive Stroker by LELO is a dual-motor masturbator that uses sonic stimulation at both ends to deliver wave sensations along the full length of the penis. It adapts to your stroking motion and includes app-connected AI modes for stamina training. The device suits anyone seeking responsive, customisable stimulation with realistic feedback.

About this product

The F2S Double Sonic AI-Responsive Stroker by LELO combines dual sonic motors positioned at each end to create wave sensations that travel the full length during use. The motors adjust to your stroking speed and preferred mode, delivering feedback that responds to your motion rather than running on a fixed pattern. App connectivity opens up the Humanize mode, which weaves subtle timing and intensity variations into each pulse—mimicking the organic imperfections of human touch rather than pure mechanical repetition. Unlike fixed-pattern strokers, this one learns and adapts to your rhythm in real time, which is why it feels notably more interactive than traditional toys.

The silicone body is soft and skin-safe, rated to ISO 3533 standards. Eight built-in modes live on the device itself; five additional modes and the AI engine activate only through the LELO app. Textured Strokers rely on surface detail for variety, whereas this model varies stimulation through motor synchronisation and intensity curves, giving you control over sensation without needing surface texture. The 360-gram weight and 82 mm diameter suit most hand sizes, and the internal canal width ranges from 34 to 45 mm, accommodating a wide range of body types.

Features worth knowing

• Dual sonic motors: Two independent motors at either end deliver overlapping wave sensations that adjust to your stroking motion for realistic feedback.
• Humanize mode: The LELO app creates subtle, organic timing shifts and intensity variations to prevent the mechanical feel of repetitive patterns.
• AI Interactive mode: Built-in sensors detect your unique rhythm and sync motor intensity and vibration automatically, requiring no manual mode switching during use.
• Stamina training: Guided Kegel-style exercises accessible through the app help build sexual endurance over repeated sessions.
• SmoothRise technology: Transitions smoothly across 16 intensity levels without jarring jumps, allowing precise fine-tuning of sensation strength.

Full specifications

• Materials: Body-safe silicone sleeve, ABS plastic internal structure, aluminium alloy motor housing.
• Length: 140 mm overall; internal canal depth accommodates most sizes comfortably.
• Diameter: External 82 mm; internal canal width 34–45 mm to suit a broad range of body types.
• Weight: 360 grams, providing substantial feel without excessive heaviness.
• Power: Rechargeable lithium battery; 2 hours charging time delivers up to 2 hours continuous use.
• Waterproofing: 100% waterproof; safe for use in the shower or bath.
• In the box: Stroker, USB charging cable, LELO app access, user guide, and safety information.

Using a masturbators and stroker properly

Before first use, charge fully via USB and download the LELO app to opens up the AI and Humanize modes. Clean the stroker thoroughly with warm water and a toy cleaner, then dry completely. Apply a generous amount of water-based lubricant to both the external opening and your penis before inserting. Start with a lower intensity (around 4–6 on the 16 levels) and experiment with your natural stroking pace; the AI sensors will respond and adjust motor intensity automatically when AI mode is active. Many people find that manual mode control (choosing a specific setting) suits them better initially than AI mode, so try both.

During use, maintain steady, comfortable strokes at your preferred rhythm. The motors at both ends mean sensation changes as you move, unlike Japanese Ona Holes, which offer fixed internal textures. After finishing, disconnect the app if you wish, then clean the stroker immediately with warm water and toy cleaner, paying particular attention to the interior. Pat dry with a soft cloth and store in a cool, dry place away from direct sunlight and heat. Never use silicone-based lubricant, as it can degrade the silicone body over time.

Should you choose this one?

Care and storage

Rinse the stroker interior and exterior with warm water immediately after use, using a toy cleaner for thorough hygiene. Dry completely with a soft, lint-free cloth before storage. Store in a cool, dry location away from direct sunlight, extreme heat, and silicone-based lubricants, which degrade the material. Keep the USB charging cable in a safe place and check it regularly for damage. Recharge every three months during periods of non-use to maintain battery health.

Read more on this

Understanding how different stroker designs work helps you choose between motor-driven models and texture-based alternatives. Learn more about the spectrum of masturbator styles and how each delivers sensation differently by reading our guide on Tenga Masturbators, which covers texture-focused designs and how they compare to app-connected, tech-forward devices.

What to expect

Most people find the F2S noticeably different from traditional strokers on the first session. The dual motors create a wave sensation rather than simple vibration, and the responsive nature of AI mode means the device adjusts as you move. First-time users often start at intensity levels 4–8 out of 16 and increase gradually; jumping straight to maximum intensity can feel overwhelming and dulls the sensor responsiveness that makes this stroker distinctive.

The app interface takes a few minutes to learn, but controls are logical once you navigate it. Humanize mode works best when combined with other modes rather than used alone; most users apply it to modes 3–6 for the most noticeable effect. Charging lasts reliably around the stated 2 hours of use, and battery degradation is gradual across years rather than sudden.

Cleaning the internal canal requires care but is straightforward with warm water and a toy cleaner. The silicone resists staining and odour well if dried promptly after use. Weight and diameter suit most hand sizes, but anyone with a significantly larger or smaller frame should measure against the 82 mm diameter and 34–45 mm internal width before ordering.

The stroker performs consistently across temperature ranges, though using it in a warm shower slightly warms the silicone and can improve the sensation for some users. Battery life remains stable through dozens of sessions before showing any meaningful decline. Return rates are low among buyers who engage with the app settings; dissatisfaction usually arises when people expect the device to work richly from the box without downloading the app.

How it compares

The final word

Order the F2S Double Sonic AI-Responsive Stroker by LELO from Malechastity.com.au with discreet Australia-wide delivery if you want a stroker that listens to your body and adapts in real time. The dual motors, AI responsiveness, and Humanize mode deliver a level of customisation and realism that standard strokers cannot match. If you benefit interactive feedback and explore the full range of modes, this is the stroker that rewards your engagement. Australian Owned, Australian Stocked.