With switch volume adjustment and solid state filter capacitance, the power amplifier board is reliable to use. Due to short-circuit protection, overheating protection and over-voltage protection, the power amplifier board is safe to use. Made of high-quality PCB material, the power amplifier board is durable and sturdy compatible long-time use. The length of the item is approx 2.95cm, the width is approx 2.02cm, and its thickness is approx 1.5cm. It is suitable compatible home audio systems, active speaker applications, as well as other music equipment. Item Name: Digital Amplifier Board Material:PCB Supply Voltage: DC 5V Output Power: Minimum 2x3W Model: GF1002 Size:2.95cmx2.02cmx1.5cm/1.16inx0.8inx0.59in Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension differences due to different manual measurements. Package Includes: 5 X Digital Amplifier Boards