Model:W30 Bluetooth Chip: JL6973D4 Bluetooth Version:V5.3 Transmission Distance:10m Drive Unit:8m Working Frequency:2.402GHz-2.480GHz Battery Capacity:40mAh (70% volume) Charging Box Capacity:300mAh (70% volume)(Plus protection board) Charging Box Capacity Time:2H Music Time:About 7H Talk Time:About 5H Standby Time:About 120days Input voltage:DC 5V