The mic preamplifier supports standard condenser and dynamic microphones. There are three output ports. Maximum amplification gain is 60dB. The adjustment range for treble, mid-range, and bass is 15dB. Features a low-cut switch. Signal attenuation below 80Hz improves speech intelligibility and reduces microphone pops. Includes an overload indicator light. The light illuminates when the microphone signal is too loud; adjust the gain knob to a moderate position during use. Set to a level where the indicator does not light up or only occasionally blinks. Powered by DC 5V12V. Can be powered by a power bank or mobile phone charger. Use a high-quality charger, as poor power supply may cause AC noise. Color: black Material: plastic Type: 3.5mm/6.5mm Package Contents: 1 x Main unit 1 x DC cable 1 x male to male cable Only the above package content is included; other items are not included. Note: Lighting effects and display differences may cause slight variations in color between the image and the actual item. Measurement error allowance is +/- 1-3 cm.