ATD Automatic Timer DisconnectAdjustable time or voltage based battery disconnect automatically shuts off devices to preserve battery power 12V signal triggers relay to connect battery power to devices. When signal is removed the timer is activated and will disconnect devices after a preset time Disconnect can be triggered based on time, low voltage, or removal of 12V signal Low voltage will disconnect if time hasn_t been reached to preserve battery power Time and voltage options can be turned off to allow 12V signal based disconnect Clip-on cover insulates terminal connections One-piece stainless flange nuts ensure safe and secure connections Integrated LED indicates status Specifications: Nominal Voltage:12V DC Amperage Operating Current: 175mA(Combine / 15mA(Open) Continuous Rating:120A Intermittent Duty: 210 Terminal Stud Size: 3/8"-16 (M10) Time Range: 15min-4hrs WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov. Owner&';s Manual (pdf)