Features: Functions: Eliminate or reduce original singing voice in the song. Name:VC2 With Bluetooth-compatible receiving function, it supports wire and Bluetooth-compatible input and can be used as a Bluetooth-compatible receiver. The Bluetooth-compatible version is 5.0, with external antennas and a receiving distance of dozen of meter. This device adopts hardware circuits plus software algorithms, which can remove original singing voice in the song to greatest extent. The following issue need to be note during use: The song must be in stereo and the volumes of the left and right channel should be the same. The recording quality of the song should be good. Different songs have different recording processes, and the result of vocal elimination may vary. This is a normal phenomenon Specifications: Component:Metal Size:Approx.108x42x26mm/4.25x1.65x1.02inch Color:Black; Input and output interfaces: 3.5mm Power supply: DC5V Power consumption: 0.25w Frequency response: 20HZ-20KHZ Input impedance: 50KΩ Output impedance: 600Ω Package Includes: 1pc Vocal Remover 1pc USB Cable note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.