A2

Speaker diameter: Φ50 milimeters
Impedance: 20 Ohms
Headphone Sensitivity:117dB S.P.L.at 1KHz
Rated power:15mW
Aggregate capability:50mW
Frequency Response:20Hz-20,000Hz
Microphone Sensitivity: 50-10 KHZ
Microphone Impedance: 2.2k Ohms
Connector:stereo with usd+ 3.5mm+mic

7.1 Virtual Surround Sound and Vibration are Option.