Features: TM4 four-channel mixer, compact sudio system for home studio, professional studio recording, music production, stage performance, DJ equipment, online live, karaoke, etc.. Support both Power Bank supply and 110- universal voltage, can be used outdoors and indoors, portable and convenient to use. Using USB Input for connecting devices to play MP3, MP3 part with independant control. 3-band EQ on all channels, the HI control govems the high frequency , the control boosts/cuts the midrange frequencies, and the LOW control raises/lowers the gain of the bass . Built-in reverberation delay effect, 48V phantom power supply, and BT function. Specifications: Model: TM4 Noise: -80dB Frequency Response: 20Hz-20kHz ±0.5db THD : ≤0.03% @ 1KHz SNR: ≥82dB Max Input Level of Mic: 16dBu Max Input Level of Circuit: 30dBu Max Input Level of Stereo: 20dBu Headphone Output: 200Ω/300mW Other Output: +20dBu Item Size: 20 * 24.6 * 5.8cm / 7.87 * 9.69 * 2.28in Item Weight: 970g / 34.22oz Package Size: 31.5 * 24 * 8.5cm / 12.4 * 9.45 * 3.35in Package Weight: 1400g /49.38oz Package List: 1 * Mixing Console 1 * Charging Adapter 1 * User Manual