● Bluetooth version: 5.3
● Chip model: AC6973D4
● Headphone battery capacity: 30mAh*2
● Battery capacity: 300mAh
● Single size: 13mm (32Ω±10% (at 1kHz))
● Sound pressure standard: 105±3dB (at 1kHz, 0.179V)
● Frequency response range: 50 Hz - 50 kHz
● Bluetooth band: 2.402-2.480GHZ
● Bluetooth distance: >10M
● Standby time: 100H
● Playing time: 4.5H
● Call duration: 3.5H
● Earphone charging time: 1.5H
● Charging time: 1.5H
● Bluetooth protocol: HSP/HFP/A2DP/AVRCP
● Decoding format: SBC/AAC