Awei AT9 True Wireless Headphone - Stereo Sound With HD Microphone. Lightweight Foldable Body - Off White

Bluetooth version: V5.4

Support Protocol: Supports A2DP - AVCTPAVDTP, AVRCP, HFP, SPP, SMP, ATT GAP \ GATT \ RFCOMM \ SDP - L2CAP PROFILE

Call time: 24 hours

Music playback time: 25H

Charging time: 1.5h

Charging voltage: 5V

Bluetooth working frequency: 2402-2480MHz

Environmental temperature: -20/+60 °C

Transmission distance: 12M

Battery capacity: 300mAh

Horn specifications

Driver unit: 40MM

Sensitivity: 113DB ±3DB

Impedance: 32 Ω