Model:W26 Bluetooth Chip: AB5636 Bluetooth Version:V5.3 Transmission Distance:10m Drive Unit:10mm Working Frequency:2.402GHz-2.480GHz Battery Capacity:40mAh Charging Box Capacity:350mAh Charging Box Capacity Time:About 1.5H Music Time:About 5.5H Standby Time:About 270Days Input voltage:DC 5V