F9-5 TWS 5.1 Wireless Bt Earphone Touch Earbuds Music IPX7 Waterproof LED Display Headset 9D Stereo Sport Headphones   Product Parameters BT Version V5.0 Chipset BT8832A Working distance 10m Call time 5-6H Play Music Time 5-6H Standby time 650H Frequency 2402MHz-2480MHz Battery type 3.7v,>50mA Battery Charging Time 1-2H Charger case capacity 2000mAh   Package: 1x F9-5 TWS 5.1 Wireless Bt Earphone (USB Black)