Stable wireless Bluetooth connection, supporting most electronic devices with Bluetooth modules on the market Built in audio playback module the built-in MP3 audio playback module can play the music files in the storage device inserted in the USB socket. You can switch the music you want to listen to through the control button at the bottom of the display screen Built in digital high-efficiency power amplifier, built-in digital semiconductor driving power amplification circuit, which is different from the traditional old transformer power amplification circuit. This mixer power amplifier all-in-one machine only needs DC 12v3a power supply to drive any pair of household passive speakers or cassette boxes of less than 8 inches at the same time Integrated solution, small footprint Low thermal requirements Passive ventilation and heat dissipation meet the demand. Exquisite workmanship, each place is exquisitely carved, with complete functions and simple operation. It is tailored for all kinds of performances High efficiency semi conducting digital power amplifier circuit The peak power is 200W, which can drive a pair of household sounds below 8 inches. Mic input:electronically balanced , discrete input configuration Frequency response:10 Hz to 200KHZ Gain range:+14db to +60dB SNR:120dB E.I.N. Line input:electronically balanced Frequency response:10 Hz to 130 KHZ Gain range:-6 db to + 38 db SNR:95 db E.I.N. EQUSLIZATION LOW:50 Hz+/-15 db MID:700 Hz+/-15db HI:10 KHZ+/-15db MAIN MIX Main Outputs:+ 28 dbu balanced/+22 dbu unbalanced AUX Send:+22 dbu unbalanced EFF Send:+22 dbu unbalanced Tape Out:+22 dbu unbalanced Phones Output:+ 15 dbu / 150 Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the United States, the Philippines,Taiwan and so on. size: 26.5 x 21 x 9CM Material:Metal colour:black Package Contents: 1 x Host 1 x PLUG Material:Metal colour:black Package Contents: 1 x Host 1 x PLUG Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.