Features: 4/6/8 adopts imported components and imported audio processing integrated IC to make the machine stable and durable. 1. Using multi-scene 99DSP digital effector. 2. +48V fantasy power supply. 3. Built-in sound card/Bluetooth function. Built-in USB computer two-way port, imported materials let you experience easily. Suitable for large, medium and small occasions, performances and conference offices, tea restaurants, government projects, etc. can be easily controlled. technical parameter: Model Channel: 4/6/8 Stereo Channel: 1 Channel EQ: 3 BAND Group: 1 MIC:2/4/6 EFFECT: 99 digital DSP USB BT Master EQ:7 Balance Auxiliary output AUX:1 Power Consumption:35W