REMAX Marshmallow Series True Wireless Stereo Earbuds for Music&Call TWS-19

Bluetooth Version/chipset：JL：6983 Supported protocols：HFP,HSP, A2DP, AVRCP Transmission Distance：10m Working Voltage：3.7V Working Time : 5 hours erabud /charging case Battery (mAh)：30mAh/3.7V 320mAh/3.7V Charging Time：≈1H