Chipset: Bluestrum AB5656C2
Driver Size: Φ13mm ，32Ω/25MW
Frequency Range: 20Hz-20KHZ
Transmission Distance: ≥10m
Bluetooth Version: 5.4V
Speaker sensitivity: 104+/-3dB (1Khz)
Supporting protocols: A2DP, AVRCP, HFP
Decoding method: SBC, AAC
Battery Capacity: 30mAh for earbuds, 300mAh for charging case 
Playing Music Time : up to 4 hrs
Charging Time: around 1 hours for earbuds, 2 hours for charging case 
Charging port:  USB-C