Features: 

Stereo/Mono Work Module Controlled By Module Switch, 4 Unbalanced Input Channels And One Balanced Output Channel. Separate Volume Control,

Built-In 9V Battery Compartment And External Power Supply

Gain Is 24db,Frequency Responsibility Is 10hz-100khz,Total Harmonic Distortion Is Less Than 0.05 percent , The Max Output Level Is +16db(Balanced Output).

Continuous  Working (For More Than 12 Hours)

Power Supply: Dc 12v (Not Included)

Sold as: Unit

MOQ: trial order 500 PCS

Certificate: CE, ROHS

Factory Picture :