EDIFIER W820BT bluetooth Headphone Wireless Over-Ear Hifi Noise Isolation Stereo Headset With Mic for Phone Tablet

SPECIFICATIONS
Driver unit: 40 mm NdFeB drivers
bluetooth version: bluetooth V4.1
Supported profiles: HFP, HSP, A2DP, AVRCP
Frequency Response: 20 - 20,000 Hz
Impedance: 32Ω
Battery Capacity: 1340mAh, 3.7V
Charge Time: 4hrs
Standby Time: 80hrs
Sound pressure level: 100 dB
Weight: 0.26kg
 
FEATURES
Dual batteries setup, playback time for up to 80 hrs.
bluetooth V4.1 with CSR technology.
Foldable design with flexible steel headband.