● 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