Features: brand new and high quality Wide Range of Applications: Car speaker computer TV power amplifier. for SD Card, U disk, AUX input, MP3 format for play, support wireless connection.Supports FM stereo radio. Pure mobile phone operation connection is connected and ready to use, ultra-small size, lossless decoding, support for back-to-back connection. Lightweight Size: Portable and small size, easy to store and carry, bring you convenience. Product Dimension: approx. 16.2x11.8x5.3cm/6.38x4.65x2.09inches. Specifications: Material: Metal Color: As the Picture Shows Product Dimension: approx. 16.2x11.8x5.3cm/6.38x4.65x2.09inches Net Weight: 1060g/2.34lbs 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. Package includes: 1PC Digital Power Amplifier Board