Portable Rechargeable Trolley Speaker 12" 40W LED Light Bluetooth TWS/SD/USB Features Model: KK-12101 Bluetooth version: 5.0 Color: Black Dimensions: 608 * 397 * 509; Chip: Zhongke Lanxun Battery: 3600 mAh Woofer size: 2x 12" Power 40 W Audio inputs: SD card, USB, AUX and other modes Charging for about 3.5 hours; Music playback time: 3 hours; Double amplifier + treble Equipped with a knob for microphone volume control, knob for master volume control With remote control for remote control