2x8" 30W Bluetooth/USB/AUX/SD rechargeable speaker with microphone KK-8202 Characteristics Model: KK-8202 Main color: black Connectivity: Bluetooth 5.0 Chip: Zhongke Lanxun Battery Capacity: 3600mAh, Recharge for approximately 2.5 hours Music playback time: 3 hours Dual power amplifier Woofer Size: 8 inch * 2 RMS Power: 30W Audio inputs: Bluetooth, SD card, USB, Audio jack With microphone volume control knob, general volume Effects control LED lighting