Bluetooth Version: V4.2 + EDR Working distance: 10m Frequency range: ISM range from 2.4 to 2.4835 GHz Type: Stereo Headphones with Microphone Speaker: 10mm Sensitivity: 115 dB SPL at 1 kHz Impedance: 32 ohms Frequency Response: 20 Hz-20 kHz Rated power: 2x20mW Lithium battery: 120 mAh...