With stable quality, portable, artistic, small and exquisite. Suitable for company, stage, home, KTV rooms, etc. Connect the front of amplifier to input and power control the host. Dual Microphone inputs, video input and sound output for video signal, volume can be adjusted individually. Reverberation delay function and audio inputs/outputs for left/right channel Volume frequency regulation. Volume frequency regulation. Color: Black Plug Type:US Plug,it applies to Canada, India, Japan, Mexico, Thailand, the United States, the Philippines and so on. Model: N-3 material: metal Working Voltage: 9V-12V Total Harmonic Distortion: Less than 0.5% @ 1KHz Item Size: 14 * 8.5 * 4cm / 5.5 * 3.3 * 1.6in Item Weight: 170g / 6oz / set Package List: 2 * Karaoke echo sound mixer 2 * plug 2 * audio cable 2 * video cable Only the above package content, other products are not included. Note: Light reflection 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.