Features: The TPA3255 is a high performance Class D power amplifier with Class D efficiency and true to high-end sound quality. The device features an advanced integrated feedback design and proprietary high-speed gate driver error correction (PurePathTM Ultra high definition). This technology allows the device to maintain ultra-low distortion throughout the audio band while delivering perfect sound quality. Using original TPA3255 digital power amplifier Bluetooth-compatible chip. The main filter electrolytic capacitor 2200UF/63V ensures a strong and continuous power support. The red-ash ring high-current audio special inductor is used to ensure the sound is crisp and powerful. PCB adopts 1.6mm thick double-sided sheet, 2.0 oz copper thickness, and tin-spraying process to ensure good passing performance of large and small currents. First-class PCB quality.This machine adopts all-aluminum chassis, and the surface of the chassis is all processed by wire drawing oxidation coloring process. Input method: analog and Bluetooth-compatible input function. When two modes are input at the same for time, the Bluetooth-compatible input is prioritized. After the Bluetooth-compatible connection, the RCA input is automatically disconnected; when the analog input is required, please turn off the Bluetooth-compatible function of the mobilephone to switch. Specifications: Material:Metal Color:Black Working method: Class D Working voltage: DC30V-48V (inside + outside - 5.5x2.1) Total output power at 1% Total Harmonic Distortion + Noise (THD+N) 240W/4Ω, 240Wx2 output Total output power at 10% Total Harmonic Distortion + Noise (THD+N) 325W/4Ω, 325x2 output Package Includes: 1x TPA3255 Power Amplifier note: Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!