Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si The input and output of this machine have XLR interfaces, with 48v phantom power supply, supporting common condenser and dynamic microphones; The input XLR is balanced, 3.5 and 6.5 are unbalanced, and the three output interfaces are balanced and compatible with unbalanced output; Output wiring chooses the appropriate package option according to your own equipment; The DC power supply range is between 5V-12V, and can be powered by a power bank or a mobile phone charger (please use a high-quality charger, poor quality will have AC noise), or a 12V power adapter. Amplification gain: 60db; High, medium and low frequency adjustment range 15db; Working frequency: 20HZ-20KHZ; Power consumption: about 0.6W Colour: black Material: Metal+Plastic Package Contents: 1*Balanced Dynamic Mic Amplifier 1*XLR line Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.