Description: 【Digital Processor】: 4 Channels Audio Mixer built in digital effect processor, fast response, professional output has better reverberation effect. 【4 Channel Mixer】: Multifunctional professional mixer, 2 channel mono input, 2 channel stereo input. Balance adjustment, fidelity sound quality, USB connection, Bluetooth connection. 【48v Power Sound Card】: 4 Channel Mixer Sound Mixing Console connected to laptops, computers, audio equipment, suitable for PC, studio condenser microphones. Compatible with microphone/instrument connection and other equipment, suitable for home KTV, band performances, campus activities, meetings etc. 【Professional Microphone Vocal Effects】: reverb/echo independent three band equalization pre delay, direct voice, etc. Powerful sound processing makes your voice range wider and easier to sing a good voice 【Bluetooth Connection Input】: Wireless transmission between Digital Mixer and Bluetooth devices such as Bluetooth mobile phones//laptops, supporting wireless sound source input Specification: Material: iron Size Chart: 38.5cmx30cmx9cm/15.16inchx11.81inchx3.54inch Package Includes: 1x Audio Mixer 1x plug (US standard) Note: Please allow slightly errors due to manual measurement and different monitors.