Description: brand new and high quality Feature: Professional 4-channel mixing console and monitor paths plus effects processor with two mono channels and one stereo tape channel. Can connect wired/wireless/capacitor microphone, applicable to the family KTV, campus speech, meeting etc. Built in reverb effect,by adjusting knob to adjust the reverb depth and delay effect. USB/MP3 Jack,USB Jack can be connected to U disk or MP3 and other portable audio equipment. 3 equalization regulate,by adjusting knob to adjust the reverb depth and delay effect. Built-in Bluetooth-compatible function, high-speed wireless connection, support most Bluetooth-compatible devices. Specifications: Item Type: Mixer Audio Console Material: ABS Size: 240x202x38mm/9.4x7.9x1.4in Color: Black Plug Type: US Plug, EU Plug(Optional) Frequency response: 20Hz-20KHz minus or plus 0.5dB Noise: -80dBu Earphone Output: 200n 30mW Total harmonic distortion: less than 0.03%@1KHZ Quantity: 1 PC Note: Transition: 1cm=10mm=0.39inch Please allow 0-1cm 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 Package Includes: 1 Set x Mixer Audio Console (other accessories demo in the picture are not included )