Model: W32 Bluetooth Chip: AB5616T Bluetooth Version:V5.2 Transmission Distance:10m Drive Unit:8mm Sensitivity:102±3dB Working Frequency:2402MHZ~2480MHZ Battery Capacity:30mAh Charging Box Capacity:200mAh Charging Box Capacity Time: 1H Music Time:About 2.5H (75% volume) Standby Time: 90days Input voltage:DC 5V