Product details of AWEI T39 TWS bluetooth 5.3 Earphone HiFi Stereo 300mAh Battery Touch Control Mini Semi-in-ear Sports Headphone with Mic

• Bluetooth version v5.3 (AD6973D4)
• Support protocol: HSP, HFP, A2DP, AVRCP
• Channel system: stereo
• Battery capacity: 35mAh*2 (no protective board, lithium battery protection IC)
• The battery capacity of the charging warehouse: 3.7V/300mAh (with a protective board)
• Drive unit: 13mm in diameter
• Charging time: 1H
• Calling time: 7H
• Playing time: 6H
• Standby time: 200H
• Headphones+charging warehouse with use time (80%volume): 20H
• Sensitivity: 93 ± 3db
• Verse impedance: 32
• Enter charging standard: DC 5V
• Bluetooth operating frequency: 2.402G-2.480G
• Maximum transmission distance: 10M
• Voice Tips: Support
• Multi -point connection: not support
• How to wear: Enter the ear
• Manual: Chinese and English
• Interface: Type-C
• Waterproof level: ipx6