The UC02 communication system is designed to provide a safe method of communication whilst riding, as it allows you to control your smartphone hands free, through Siri or other virtual assistants. In addition to the hands free function you can also simultaneously add another sound emitting Bluetooth device, enabling you to listen to GPS and audio at the same time. The all new LED function indicator makes using the device on the road easy and safe. Designed to be completely integrated in your helmet. Two speakers for stereo audio & GPS at the same time. Works with all Bluetooth devices, GPS / Phones / MP3 players. Hands Free automatic voice answering and voice control. (Siri) Dual link functionality: in addition to the phone function you can simultaneously add another sound emitting Bluetooth device. LED function indicator. Glove friendly and universal for jet, full face, flip-up & trail helmets. Talk time: 7 hours. Standby time: 60 hours. Charging time: 2 hours. Frequency: 2.4 GHz. Range: 10 metres. Weight: 38 grams Battery Lithium 110 mAh