Specification: Origin: Mainland China Product model: XH-M544 Chip type: TPA3116D2 Power supply voltage: DC12-26V Output power: maximum 150W Signal to noise ratio: 100db Number of channels: Mono Product size: About 77x73x16mm/3.03x2.87x0.62inch Net weight of product: 67g Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1 x Amplifier Board 1. High Efficiency Digital Amplification: With over 90% power efficiency, the XH-M544 produces less idle loss and generates minimal heat while delivering powerful sound. 2. Advanced Heat Dissipation: The XH-M544 features an array of heat sinks that create convection cooling effects, which results in improved heat dissipation. As a result, it operates at lower temperatures compared to other amplifiers. 3. Best for Home Theater: The TPA3116D2 has a switching frequency of up to 1.2 MHz and over 90% power efficiency, which ensures minimal distortion during normal use. The XH-M544 offers a superior audio experience with its impressive sound quality, making it good for home theater enthusiasts. 4. Great for DIY Sound Systems: With powerful output and outstanding sound quality, the XH-M544 is perfect for those looking to develop their high-power single-channel sound systems. This product is versatile and can serve various public venues and home entertainment needs.