Bluetooth V3.0 and is compatible with Bluetooth version V2.1 and V2.0 standards Chipset CSR V3.0 Bluetooth chip Supports Bluetooth A2DP, Headset Profile, Handfree Profile Transmission power Class2 Compatible with all smart phone with a Bluetooth compatible mobile phone with Bluetooth wireless transmitter that can be used for online voice chat Distance of 10 meters Frequency 2402MHz ~ 2480MHz ISM Band Microphone sensitivity -45dB (0dB = 1V/Pa, 1KHz) Product weight 14g Talk time 4 hours 100 hours standby time Operating Voltage 3.3 ~ 4.2V Charging voltage 5V Charging current 150mA Charging time is less than 2 hours Charger Power Supply 110-240V Ambient temperature for the battery charge capacity and lifetime , please try to keep the battery between 15 ¡ã C to 25 ¡ã C between Matching method 1 , press the power button until the indicator flashes red and blue alternately ; 2, with mobile search, find Bluetooth ; 3 , select the connection ; Standard preparation USB charger , USB charging cable, manual Battery Type Built-in rechargeable lithium battery Wearing style pen Available colors black, silver Other features : headset, hands-free , stylus triple feature , with phone calls to remind and other smart phone anti-lost function , use of safe, low radiation. Warranty 1 , Genius ; 2 year warranty, 15 days unconditional return policy .
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