Lelo - f1s v2 - interactive masturbator with app - bluethe f1s v2 features an improved m-cup design, a flexible soft sleeve, a wider range of sonic intensities and four unique designed program variations. the masturbator has an open interface with 10 state-of-the-art sensors for real-time performance feedback via the lelo app - the user can create the most satisfying programs themselves for an ultimate orgasm. the stunning sensation of sonic waves and the patented cruise-control technology guarantee a satisfying stimulation.flexible, soft sleeve for ultimate enjoymentmore intense and profound vibrations4 unique vibration modeswider range of sonic powerapp connectionsensonic technology100% waterproof and rechargeableusing f1s v2 without the app1. before the first use, charge the f1s v2 for 2 hours.2. press the center button for 1 second to turn it on.3. the led lights will blink, indicating the battery level.4. the led lights will turn on permanently and show the vibration level.5. press + or - to adjust the vibration intensity.6. press the center button for 3 seconds to turn it off.7. press and hold + and - simultaneously for 5 seconds to lock the f1s v2 to avoid unintended activation.using f1s v2 with the app1. download the app (ios or android).2. before the first use, charge the f1s v2 for 2 hours.3. press the center button for 3 seconds to turn on the product while activing the bluetooth.4. all led lights will blink simultaneously showing the bluetooth connection.5. open the f1s app and once the confirmation message appears, press the center button of the masturbator to confirm.6. all leds will light up permanently, showing the connection was successful.7. if the connection fails, the device will turn off automatically after 30 seconds.8. the status of the battery and vibration mode is displayed in the app.