The live sound card contains 16 live effects, 12 electronic music effects, 4 sound field effects, 3 voice change. Digital display, one-key dodge, volume adjustable. It supports two phones live and one phone BT accompaniment meanwhile. Specifications: Material: Metal Color: Black BT Protocol: 2.1 Input Voltage: 5V Channel: 2.1 Battery Capacity: 1000mAh Item Size: 133 * 66 * 11.5mm / 5.24 * 2.6 * 0.45in Package Weight: 502.4g / 17.72ounces Package Size: 225 * 140 * 55mm / 8.86 * 5.51 * 2.17in Packing List: 1 * Live Sound Card 1 * USB Cable 2 * Audio Cables 1 * User Manual