Bluedio HT(shooting Brake) Wireless Bluetooth Headphones BT 4.1 Version Stereo Bluetooth Headset built-in Mic for calls

Transducer type: dynamic
Bluetooth version: V4.1
Frequency range: 2.4GHz-2.48GHz
Operating distance: up to 10m (free space) 
Bluetooth profiles: A2DP  AVRCP  HSP  HFP
Impedance: 16Ω
Frequency response: 20Hz-20kHz
Sensitivity: 110dB
Distortion: