Feature: 1. Easy to Use: With simple operation, it is easy for children to learn to use, so it is suitable for small performances, home karaoke, conferences control and teachers' speeches. 2. U Disk or MP3 Play: It is compatible with U disk or MP3 player, and it has the function of selecting songs and switching. Besides, music playback device with bluetooth configuration can be connected. 3. 16 Reverbs: There is built in DSP digital effector expands the spatial effect of sound with its outstanding realism and naturalness. 4. Dual L Band Equalizer: With the dual L band equalizer, the overall pitch output of the song can be adjusted in sections, so that the voice and music can be integrated more harmoniously and smoothly. 5. Wireless Chip: There is a built‑in wireless chip, the farthest receiving distance is 50M, the best use distance is about 30M, a mixer for two microphones. And it has intelligent automatic frequency search and frequency matching function. Specification: Item Type: Small Stereo Mixer Material: Metal Gross Weight: 1495g/52.7oz Microphone Battery Type: AA, 2 (not included) (delivered without battery) Maximum Input Level: microphone input +22dBu, line input +20dBu, Maximum Output Level: +22dBu; Main Channel Level Display: 2 LEDs from signal to summit; Input Channel Level: 1LED summit display; Frequency Response Range: 20Hz to 22KHz ±1dB; Common Mode Rejection Ratio (MIC 1kHz): >75dB; Total Harmonic Block Loss: <0.05% (channel input to output); Separation (At 1kHz: Channel Mute): >80dB; Noise Figure, (rms 22Hz to 22KHz) : Equivalent signal to noise ratio -122dBu, residual output noise <-88dBu; Mono Stereo Input Channel Equalizer: Treble, Broom, +/-15dB, 12KHz; Bass, Broom, +/-15dB, 80Hz; Maximum Input Power: DC 5C/1A 5watts. Package List: 1 x Mixer2 x Microphone (Ships without Battery)1 x USB Charging Cable1 x Manual