The ZV-303 is a flush-mounted wall attenuator and uses a transformer which allows connectionof a wide range of loads (30 W or less). Volume can be adjusted in five steps. The ZV-303 features push-in terminal block for easy connection. Input Power 30 W Level Control 4 steps (0 dB, -6 dB, -12 dB, OFF) Operating Temperature -10 ℃ to +50 ℃ Finish ABS Resin Color: Off-white Printing Color: Dark Grey Dimensions 70 (W) × 120 (H) × 59 (D) mm Weight 190 g