Sescom SES-MKP-29 1-Channel Inline Balanced Audio Volume Control Every Audio Professional Needs These! No fancy explanations - just a level knob and an input XLR Connector and an output XLR Connector to control the audio level. Fast installation can be done. Includes 3M Dual-Lock type Super Velcro for endless mounting options in the studio or the field. Heavy duty construction with a housing made from strong black anodized aluminum. Good sized volume knob and quality connectors insure easy control and solid connections. Quick access of audio level by placing these in an easy to reach location, like under a desk or on a podium and can be extremely convenient and just make audio life better. Body Dimensions of black box not including knob and connectors: 3" X 1.25" X 1.25" Overall Dimensions Including Connectors and Knob: 3" X 3" X 1.25"