Features: brand new and high quality Dual Channel preamp tone board, suitable for use with power amplifier, can achieve audio amplification and high, medium and adjustment, so that you have a better listening experience. Multiple protections: power input reverse for protection, short circuit, over current, over heat, over voltage, low voltage, EMI. High Quality Material: Made of high quality ABS, stable, firm and durable. Application: Good performance, convenient and practical, suitable for home and professional use. Lightweight Size: Portable and small size, easy to store and carry, bring you convenience. Specifications: Material: Plastic Color: As the Picture Shows Product Dimension: approx. 7.2x4.5x3.1cm/2.83x1.77x1.22inches Net Weight: 120g/0.26lbs Package Includes: 1Set 2x50w Stero Hifi Power Amplifier Board note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.