Features: The XH-M546 is equipped with a pre installed TPA3116D2 power amplifier board, compatible for various audional devices. Equipped with high-defination sound quality and powerful power output, providing audional enthusiasts with an excellent auditory experience. Adopting TPA3116D2 chip, with large heat dissipation area. Supports bluetooth-compatible wireless connection and corded AUX input. It has the characteristics of low noise, low distortion, and high efficiency, with clear sound quality and stable and reliable output power. Specifications: Material: Printed Circuit Board Size: Approx. 125x88x18mm/4.92x3.46x0.70inch Name: TPA3116D2 Digital Power Amplifier Board Model: XH-M546 Chip type: TPA3116D2 Input voltage: DC12-24V Power supply current: more than 3A Output power: 150Wx2 Efficiency ratio: more than 90% Number of channels: double channels Package Includes: 1x TPA3116D2 Chip Power Amplifier Board XH-M546 1x Cable note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.