Feature 1, Let your mobile phone answer the call for you to answer the phone automatically input, call, hang up, the last number, voice call. 2, Enjoy music through T20S. Music can be controlled by AVRCP. As play/pause/last track/next track. 3, IP56 waterproof is suitable for football match skiing motorcycle camping concert and so on! 4, Noise cancellation technology: DSP echo cancellation technology and noise suppression function can ensure high speed and clear speech quality. 5, Automatic switching between BT phones, walkie-talkies and stereo music. Using audio cable, you can connect MP3 GPS to you.Features: Let your mobile phone answer the call for you to answer the phone automatically input, call, hang up, the last number, voice call. Enjoy music through T20S. Music can be controlled by AVRCP. As play/pause/last track/next track. IP56 waterproof is suitable for football match skiing motorcycle camping concert and so on! Noise cancellation technology: DSP echo cancellation technology and noise suppression function can ensure high speed and clear speech quality. Automatic switching between BT phones, walkie-talkies and stereo music. Using audio cable, you can connect MP3 GPS to you. You can listen to gps-guided voice messages wirelessly via BT. DSP echo cancellation technology and noise suppression function. Memory match: there is no need to match each time. The built-in high sensitivity FM radio can be easily saved and rotated. Big button and loud voice for motorcycle rider. High capacity battery, up to 12 hours working time. OLED screens are used to visualize performance. Specifications: Condition: 100% Brand New Material: ABS Color: black Model: T20S Compatible with bluetooth version 3.0 Support: 2 person full duplex Talking distance: 1200 meters Battery: 3.7V rechargeable lithium-ion 650 mAH Waterproof: IP56 FM frequency: 76 M~91 M (Japan); 87m ~ 108m (general) Standby time: about 350 hours Charging time: about 2.5 hours Talk time: about 12 hours Package List: 1 * Interphone 1 * Microphone 1 * USB Line 2 * Clip Accessories 1 * Clip 1 * Sticker 1 * User Manual