※ high-grade aluminum 1.5U black drawing panel, nice; ※ panel volume knob with all-aluminum, high-grade atmosphere; ※ The internal circuit adopts the whole chip technology, the performance is more stable, the line is more beautiful; ※ built-in VHF wireless receiver mode, configure a handheld 1 headset wireless microphone; ※ PCB with double-sided circuit, component adhesion strong; ※ Class D amplifier circuit, low heat, strong power; ※ three-way signal input (a line, two-way microphone); ※ comes with USB, SD interface, power on automatic playback amplifier; built-in FM radio function; ※ four digital tube display, touch function keys; with infrared remote control operation function; ※ independent adjustment of the volume of each channel; ※ tweeter, bass independent adjustment; ※ 3 unit working status indicator; ※ power supply, audio transformer using pure copper ring transformer, low loss, high efficiency; ※ has a perfect output short circuit protection, DC protection, high temperature protection and other functions;