Echo effect and 2 microphone control. 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. Suitable for company, stage, home, KTV rooms, etc. Connect the front of amplifier to input and power control the host. Item Name: Karaoke Sound Mixer Power Supply: Adapter 110-240V Working Voltage: 9V-12V Total Harmonic Distortion: lt;0.5% @ 1KHz Material: Plastic Dimension: 14cm x 8.5cm x 4cm/5.51inch; x 3.35inch; x 1.57inch; (Approx.) Notes: Due to the light and screen setting difference, the item 39;s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Karaoke Sound Mixer 1 x User Manual 1 x Power Adapter(EU/US Plug) 3 x Audio Adapter Cables