Feature:<br /><br />Drive: 15mm<br /><br />Impedance: 32 OHM<br /><br />Bluetooth version: Bluetooth v4.1 + EDR<br /><br />Bluetooth use band: 2.4GHz<br /><br />Power level: CLASS II<br /><br />Output power: 30mW<br /><br />Bluetooth distance: 10 meters barrier<br /><br />Frequency response: 20-20000Hz<br /><br />Operating voltage range: 3.0V-4.2V<br /><br />Mitou sensitivity: -42dB<br /><br />With A2DP / AVRCP high quality stereo audio transmission and remote control protocol<br /><br />Powerful noise de-noising circuit (active noise reduction)<br /><br />Switch between Chinese and English (boot does not connect Bluetooth state・ press the switch 2 times・ hear the tone switch successfully)<br /><br />Charging time about 1 hour (power indicator charging: red light・ full power: red light off (blue light).)<br /><br />Product Size: Length 25MM. Width 15MM. High 35mm<br /><br />Talk time is about 4-5 hours<br /><br />Music time about 4-5 hours<br /><br />Standby time is about 120 hours<br /><br />The charging time is about 60 minutes<br /><br />Battery capacity 60MAH<br /><br />Charging power: DC5V power supply [round hole interface] (computer USB port・ mobile phone charger・ car charger)<br /><br />Compatible phone: compatible with Andrews・Saipan system with 99% of the Bluetooth mobile phone<br /><br />Standard: headset + charging cable + manual + box<br /><br />Listening to the song correct・ support songs and then call・<br /><br />Caller ID・ the last call back・ all intelligent Chinese and English voice prompts・ boot・ pair・ shut down the phone power will be low voice prompts;<br /><br />Apple phone power display・ you can always watch the headset power situation・ do not worry about the headset no electricity to make your life worry;<br /><br />One to two connections・ can be connected to two mobile phones;<br /><br />Bluetooth headset every time connected to the phone after the shutdown・ and then open the Bluetooth headset will automatically connect back to the phone・ but also more convenient;<br /><br />Intelligent compatibility: support all with Bluetooth mobile phone・ tablet・ notebook・ singing it・ QQ music・ movies・ etc.・ all the mobile phone