Bluetooth 5.0 (Actions BT chipset) Frequency range:60Hz-20Khz Operation distance: 10m Output power:15w*15w*40w SNR:80db Battery Capacity: 7.4V/5400mAh (6X1800mAh battery inside) Loudspeaker size: 2*87mm+1*133mm Charging Voltage: DC 10V Charging time: 4-5 hours Playing time:6 hours at middle volume Product size:438*181*194mm Function:IPX7/TF/AUX IN/Bluetooth/USB/Power bank/EQ/TWS