Features: HF210PLUS is a 2.1CH/2.0CH channel amplifier with USB Drive Plays Playbacks and 5.1 Wirelessly inputs Two digital amplifier chip, output powers up to 50Wx2+100W. Strong power Operational amplifier adopts NE5532 pluggable design, which can be upgraded to more advanced operational amplifier by itself. Wirelessly adopts OCC3034 wirelessly, support losslessly transmission Wirelessly Decoding use PCM5102, so that the wirelessly sound quality is comparable to corded transmission Support MP3WMA, format. Large heat sink ensures long stability. Large-capacity filter capacitors make power more stable Specifications: Model No: HF210PLUS Output channel: 2.1/2.0channels Usb Drive Plays file format: MP3WMA 16BIT, 44.1KHZ-48KHZ Power amplifier chip: TPA3116x2 Wirelessly version: 5.1 Wirelessly Frequency response range: 20-20KHZ Power: 19V-24V Output power: 50Wx2+100W/4Ω,at 24V Adaptive speaker: 10W ~ 300W 4Ω8Ω16Ω Wirelessly transmission: 10 metres Protections mechanism: power reverse protections, shortcircuits protections, self-recovery overheating protections Power specification: DC5.5x2.5 Package Includes: 1Set HF210PLUS 2.1CH/2.0CH Amplifier note: Due to the problem of lighting effect and shooting, there might be tolerances in product, please understand. Please allow 0-1cm error due to the measurment