Support profile: HFP1.7/A2DP1.3/AVRCP1.6 Chipset: Actions 3015 Bluetooth 5.0 Speaker diameter: 6 mm Frequency Response: 20 hz ~20K hz Receiver: 6mm 20mW Playtime: 6 hours(earbuds) + 9 hours(charge box) Battery: 40mAh(earbuds)*2+400mAH(charge box) Water resistance: IPX5 Charge port: Type-C Wireless charging function