Suitable for sound cards and stereos, the sound is fuller and more powerful after using the microphone amplifier, and singing is easy and effortless; Support 48V condenser microphone, dynamic microphone; Balanced amplifier circuit, gain 22db for 6.5 single-ended input, gain 27db for XLR balanced input; You can use the mobile phone charging head for charging, the dynamic microphone can be used continuously for more than 10 hours, and the condenser microphone can be used for about 3-5 hours with 48V turned on. Different microphones perform differently; Do not turn on the 48V switch when using a dynamic microphone. Colour:black Material:metal+plastic Size:about 9.4 x 5.3 x 4.1cm Package Contents: 1 x amplifier 1 x Charging 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.