Bluetooth Mode: Stereo calls vibration one with two voice prompts Frequency range: 2402MHZ-2480MHZ Receiver sensitivity:-80dbm Wireless transmitter Standard: CLASS2 Transmission range: approximately 10 m Frequency Response: 20HZ - 20KHZSNR: 80dbm Speaker Output Power: 2 * 10mw Battery: lithium

Bluetooth Mode: Stereo calls vibration one with two voice prompts Frequency range: 2402MHZ-2480MHZ Receiver sensitivity:-80dbm Wireless transmitter Standard: CLASS2 Transmission range: approximately 10 m Frequency Response: 20HZ - 20KHZSNR: 80dbm Speaker Output Power: 2 * 10mw Battery: lithium polymer battery 150maH Charging time: 3 hours Continuous talk: about 6 hours (battery is full) Standby time: about 100 hours (battery is full)