Feature: 1. Basic Specifications: Audio amplifier dynamic power amplifier is about 100 times, capacitance is about 22 times, music part is about 5 times, mixed output can drive headphones. 2. Support Stereo: The audio amplifier supports stereo and multi function audio mixer, even if the voltage is low, which can work. 3. Firm Adjustment: The heavy duty metal shell structure stereo mixer and knobs have firm adjustments, the display mix can be adjusted quickly and easily. 4. Application: No need for special phono input to amplify music, the amplifier can be connected to speakers, computers, laptops, etc. 5. Metal Case: This is an audio amplifier with a metal case protection device, can be protected from vibration and electromagnetic interference. Specification: Item Type: Mini Audio Preamplifier Material: Aluminum Alloy Purpose: Audio Amplifier Colour: Black Dynamic Power Amplifier Magnification: 100 Times Capacitance Power Amplifier Magnification: 22 Times Music Part Power Amplifier Magnification: 5 Times. Package List: 1 x MA-2S Audio Amplifier Note: Please use a high quality, low ripple power supply, because the power supply is not good enough and is prone to hum.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.