1.Compressor proportion can be adjusted continuously. 2.The threshold of compress level, the start time and release time can be adjustaed. 3.Bypass switch. 4.Each channel with one noise gate. Adjustable threshold. 5.1/4 TRS, RCA socket. 6.Two additional connectors make sound reach the effect of " off screen voice". 7.Bouble channels union-control or sole-control conversion function. 8.SMT( Surface Mounting Technology), Reliable performance