Description: With 3.5mm AUX audio cable, this amplifier board is easy to use and can be easily connected to the audio. And it has a sound control button, so you can freely adjust the sound level according to your needs. What this digital audio amplifier board with high fidelity, two-channel stereo sound quality can offer you is that it can amplify the sound effect, amplify the digital audio signal, and it is low power, support short circuit protection, safe to use. It is constructed of PCB material. The length of this power amplifier is 4.5cm, the width is 4cm, and the thickness is 2cm. This audio amplifier is suitable for passive speakers, home theater, loudspeaker, and so on. Item Name: Power Amplifier Material: PCB Product Model: XH-A157 Input Voltage: DC5V Audio Input: 3.5 mm AUX Audio Cable Number of Channels: Dual Channels Output Power: 2*3W Dimension: 37*22*13mm Features: High Fidelity, Dual Channel, Stereo Sound Quality Size Details: Size: 4.5cm x 4cm x 2cm/1.77" x 1.57" x 0.79" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Power Amplifier With 3.5mm AUX audio cable, this amplifier board is easy to use and can be easily connected to the audio. And it has a sound control button, so you can freely adjust the sound level according to your needs. What this digital audio amplifier board with high fidelity, two-channel stereo sound quality can offer you is that it can amplify the sound effect, amplify the digital audio signal, and it is low power, support short circuit protection, safe to use. It is constructed of PCB material. The length of this power amplifier is 4.5cm, the width is 4cm, and the thickness is 2cm. This audio amplifier is suitable for passive speakers, home theater, loudspeaker, and so on.