The input and output of this machine have 6.5mm 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 should be selected based on your 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, as poor quality chargers may introduce 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; Color: black; Material: Metal + Plastic; Package Contents: 1 x Balanced Dynamic Mic Amplifier 1 x 6.5 audio cable 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 to appear slightly different from the actual item. Measurement may vary by +/- 1-3cm.