1 drive: 15mm
impedance: 32 ohms
3 bluetooth version: bluetooth v5.0 + edr
power level: level ii
output power: 30 mw
bluetooth distance: 10 m barrier
frequency response: 20hz 20000
9 working voltage range: 3.0 v-4.2 v.
microphone sensitivity: -42db
11 with a2dp / avrcp high quality stereo audio transmission and remote control protocol
12 powerful noise cancellation circuit (active noise reduction)