Feature: 1. BUILT IN DPS SOUND CONTROLLER: The Professional sound mixer is equipped with a digital display and a built in DPS sound controller, which allows the user to intuitively adjust the sound effects to enhance the quality and realism of the sound. 2. 4 CHANNEL: Professional sound board features 4 channels and 4 microphone jacks, suitable for a variety of scenarios that require mixing, such as band performances, recording studios and so on. 3. EQUALIZER ADJUSTMENT: Bluetooth mixer comes with a high, medium and low band equalizer, which allows users to adjust the volume and sound quality of different frequency bands as needed to get a more ideal sound effect. 4. MP3 PLAYBACK FUNCTION: 4 channel mixer can play music via Bluetooth or USB connection, which is convenient for users to select different sources of sound for mixing. 5. 48V PHANTOM POWER: When using condenser microphone powered by 48V phantom power, it can be compatible with many styles of microphones, and it is easy to interpret good sound. 6. WIDE APPLICATION: Professional mixer sound board can be used for wedding hosting, stage performance, live broadcast, KTV room, family Karaoke and other occasions, you can modulate a more balanced, more shocking effective. Specification: Item Type: Professional Mixer Sound Board Material: ABS, Iron Number of Channels: 4 Number of Microphones: 4 Equalizer: High Middle and Low Adjustment Power Supply Voltage: 100‑240V. Package List: 1 x Mixer1 x Instruction Manual1 x Power Adapter