SPT 001 Programmable Controller. Program in Four Simple Steps By following the simple instructions you can set this timer from 1 second to 240 days. 12 or 24 volt auto- sensing the Smart Switch Programmable Timer is a versatile general purpose timer/controller which will control any one of a number of applications. Programmable Time Options: Option 1 sets seconds from 1 to 240 Option 2 sets minutes from 1 to 240 Option 3 sets hours from 1 to 240 Option 4 sets days from 1 to 240 This device features three different trigger modes and is suited for a range of applications. SDP 003 Dual Programmable Controller. Two timers in One. Program in Five Simple Steps. Same as above module but comes with additional function and convenience. Following the simple instructions, you can program this timer from 1 second to 240 days for both OWand OFFtimers. The SDP 003 can also be programmed to start with either the ON or the OFF timer. The 12 or 24 volt auto-sensing the Dual Programmable Timer is a versatile general-purpose timer/controller which will manage a variety of applications. Programmable Time Options: Option 1 sets seconds from 1 to 240 Option 2 sets minutes from 1 to 240 Option 3 sets hours from 1 to 240 Option 4 sets days from 1 to 240 Input Trigger Options: (Single shot mode) The timer will complete the first time cycle then the second time cycle and halt waiting for another trigger. A second push during this cycle will cancel the operation (Reset). Input Trigger Options: (Continuous loop mode) The timer will complete the first time cycle then the second time cycle and continue this loop until turned off. As with any Smart Switch product, the SDP 003 and SPT 001 are designed and purpose built for use at sea. Both come completely encapsulated in silicon for long reliable use. Supply Voltage: 12 or 24 Volts DC | Auto sensing | Quiescent Current: 12 mA @ 12 Volts Output Load 40 amps® 12 Volts DC | Input Trigger: 5 ~ 37 Volts DC | Voltage & EMI Protected Data Retention: 40 years | Reverse Polarity Protected