Drive: 40 mm
Impedance: 32 OHM
Bluetooth version: Bluetooth v4.0 + EDR
Power Level: CLASS II
Output Power: 30mW
Bluetooth distance: 10 meters barrier
Frequency response: 20-20000 Hz
Operating voltage range: 3.0V-4.2V
Microphone sensitivity: -42dB
with A2DP / AVRCP high-quality stereo audio transmission and remote control protocol
Powerful noise noise cancellation circuit (Active Noise Reduction)
Wired and Bluetooth automatically switch to support audio input
Charging time is about 1 hour (power indicator Charging: blue light lights, fully charged: blue light goes out)
Dimensions: Diameter length 20MM. Width 15MM. 18mm high
Talk time About 4 hours
Music for about 3 hours
Charging Power: DC5V Power Interface [the hole] (computer USB port, mobile phone charger, car charger)
Compatible: Compatible with Android, Apple, Microsoft, Symbian 99% of with Bluetooth cell phones(IOS cell phone has power display)
Color: Black,White,Pink,Beige,Blue