Yideng Bluetooth for Motorcycle Helmet Headset Wireless Intercom Interphone BT-S2 Walkie-Talkie Supports FM Radio GPS Voice Command Music Hands-Free up to 3 Riders Communication in 1000m(Single) BT-S2 is Bluetooth 3.0:Full-Duplex Can talk via Bluetooth intercom function with 2-3 partners freely within 800-1000m,and 2 riders intercom at the same time.Support high speed 100-120km/h(60-75mph). DSP echo cancellation and noise suppression technology ensures crystal clear, high-definition audio for an amazing talk or music-listening experience. Powerful Functional Design: When you're riding, you can not only communicate with your friends, but also Listen to Music,Answer or Dial the call, GPS Voice Navigation,FM Radio, Bluetooth Hands Free and Wireless Streaming Music(A2DP),All functions can be Switched Freely,which make your ride more exciting and interesting. Bigger Push-button:Easy to operate even if you wear the gloves when riding,Support answer or reject coming call, auto receive a call,and support the last number redialing,volume+/-,forward/backward,Play/Pause,and No need to worry about the weather,make your outside riding more intently,safely and wonderful. The Warranty Period: 12 Months,If you have any question or Suggestion, please contact us in the first time,we are glad to serve you.