Description:  1. Bluetooth compatible: Built-in wireless Bluetooth compatible, easy to connect. Press the mode switch key to switch to Bluetooth compatible mode.  2. 4 Channel: This wireless 4-channel audio interface controller is an ideal way to mix audio from MP3, microphone, and Bluetooth compatible to connect devices.  3. USB interface: This mixer has a USB port that can be connected to a computer and used as an audio output and input interface for playback and recording.  4. Tuning: Gain, treble and bass, reverberation and volume can be adjusted freely, multi-stage tuning is stress-free.  5. Strong compatibility: Compatible with musical instruments, microphones, small speakers, power amplifiers, headphones, computers, U disks, etc.  6. Wide range of uses: Suitable for home use, stage performances, live broadcasting, recording, etc.    Specifications:  Product name: Audio Mixer  Color: Black  Material: Plastic  Plug: EU  Size: About 16 x 19 x 5cm/6.3 x 7.48 x 1.97inch(L x W x H)    Package Includes:  1Pc x Audio Mixer  1Pc x Adapter    Note:  1. Due to the light and screen difference, the item's color may be slightly different from the pictures.  2. Please allow 0.5-2 cm differences due to manual measurement.