Chipset: Bluestrum AB5636E
Driver Size: Φ16.2mm ，32Ω/25MW
Frequency Range: 20Hz-20KHZ
Transmission Distance: 10m
Bluetooth Version: 5.4V
Speaker sensitivity: 105+/-3dB (1Khz)
Supporting protocols: A2DP, AVRCP, HSP, HFP
Decoding method: SBC, AAC
Battery Capacity: 40mAh for earbuds, 300mAh for charging case 
Playing Music Time : up to 5 hrs
Charging Time: around 1.5 hours for earbuds, 3 hours for charging case 
Charging port:  USB-C