Features: Compact size 4-channel digital mixing console with 2 * XLR/TRS microphone/guitar/line combo input jacks and 2 * 6.35mm TRS mono/stereo line input jacks for connecting different devices. Channel 1 & 2 with 2-band EQ(HIGH & LOW), FX send, PAN and MIC input volume control knobs, and also built-in 48V phantom power for condenser microphone; channel 3/4 with PAN and volume control knobs. Built-in digital effect processor, with REP(adjusts echo repeat times), DEL(adjusts the time interval between each echo) and LEVEL(adjusts effect processor effect) control knobs to achieve different music effects. With two XLR balanced main outputs for the connection of active speakers, power amplifier or other audio devices; and the 6.35mm PHONES output jack for the connection of stereo headphone. Supports BT connection and USB MP3 player functions, you can play accompanying music via your smartphone or MP3 or USB disk; under the interface of playing music, long press the "MENU" key to enter the recording work mode. Compact size design, portable and lightweight, suitable for recording, online live performances, karaoke singing and conference room, it is a great assistant for guitarists, singers, music lovers and so on. Specifications: Model: SL-4 Power Supply: DC 5V 1A Power Adapter: 100-240V US/EU plug(optional) Power Consumption: Max. 5W Item Size: Approx. 16.5 * 16.5 * 6.5cm / 6.5 * 6.5 * 2.5in Item Weight: 875g / 1.9lbs Package Size: 30.5 * 21 * 9cm / 12 * 8.3 * 3.5in Package Weight: 1205g / 2.7lbs Note: The product only supports USB disk recording function, do not support computer recording. Package List: 1 * Mixing Console 1 * Power Adapter 1 * User Manual(English)