1. Professional audio mixer, 12-channel input2. 48V phantom power3. Bluetooth wireless connection4. Support USB/computer playback5. Independent mute button6. MP3 independent controlSpecification: Package Weight One Package Weight 4.50kgs / 9.93lb One Package Size 58cm * 45cm * 12cm / 22.83inch * 17.72inch * 4.72inch Qty per Carton 4 Carton Weight 23.00kgs / 50.71lb Carton Size 57cm * 44cm * 46cm / 22.44inch * 17.32inch * 18.11inch Loading Container 20GP: 231 cartons * 4 pcs = 924 pcs 40HQ: 536 cartons * 4 pcs = 2144 pcs