Directions for : 1. speakers:The speaker two thread ends at of is connected to the amplifier board audio output port, left sound channel the positive line amplifier board LOUT port, the cathode to GND.Right track the positive line amplifier board the ROUT of port, the cathode to GND. 2. audio source: a 2 core audio line, connected to the amplifier board of 3 p audio input, the other side of the audio line plug to (such as computers, mobile phones, MP3, DVD, etc.) 3. the supply: 1.8-12 v dc output of the adapter/battery/charging etc all can treasure.Will two dc cord is connected to the amplifier board.2 p source port, the positive line to VCC, negative to GND, the connection is important to make clear is negative, not blindly wiring, if meet the could seize amplifier board. 4. Play music:Put through supply, amplifier board into working state;You can the befond of according to oneself to adjust the volume knob, you can enjoy the magical of eagle amplifier board. This board features: adopts TDA2822M amplifier chip, it has many advantages such as small static current, crossover distortion characteristics.Suitable for portable, miniature tape recorder, computer audio amplifier.In the era of portable tape recorders, almost 85% are TDA2822M amplifier chip. Amplifier with the volume control potentiometer, convenient for the user to adjust the volume size, at the time Presented a cap quality knob. The audio all adopt the wiring , users do not need to soldering iron, as long as a small screwdriver can easy wiring. circuit boards have a Screwdriver screw terminal and do not need to the soldering iron can fast connection, even if you ' have any basis for , see the wiring is also very easily, DIY amplifier so simple. he performance parameters amplifier output Rating: 1 w x 2 (1-3 inch speaker) The maximum : 1.5 W x 2 (0.2-5 W can meet the speakers) Speaker impedance: 4-32 amplifier sex : greater than equal 50 db Net weight: 25 g Distortion: 0.1% Input interface: 3 p wiring jokes Adjust the form: volume adjustment The input voltage: DC1.8-12V amplifier board size: 42 (excluding potentiometer bulge) long * 30 (width) x 25 mm (high) color: blue Material: metal + PC Package Contents: 1*CAR Volume Control Potentiometer Module Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.