Water resistant IPX5 Long muisc playtime Duration play music for 3.5 hours 10 meter Bluetooth distance Crystal-clear HiFi Stereo Sound   1. Bluetooth version: V 5.0 version 2. Bluetooth protocol: HFPV1.7 A2DPV1.3, AVRCPV1.6 HID V1.0 3. Power Input: 3.2V-4.2V 4. Load condition (Load): 24ῼ /Ø10 5. Power rating: 5mW 6. Battery: Single side 50mAH polymer battery 7. Charging box battery: 200mAH polymer battery 8. Charging power: Earbuds 5V/1mA, charging box 5V/1mA 9. Transmission distance: 10 meters 10. Frequency: 2.402GHz - 2.480GHz 11. Talk time: up to 4.5 hours 12. Listening to songs: up to 4 hours 13. Standby time: about 700h 14. The charging box can charge the headset for 2 times. It takes about 1 hour for the headset to charge, and the charging box takes about 30 minutes.   Package： Charging box size: 7.3*6.3*3.6cm Single earphone weight: 5g Charging box weight: 64g Package Weight 150g Package box size 110*75*40mm PCS/CTN: 50pcs/CTN Carton size: 41*22*39cm Carton Gross Weight:8KG