NS-12-20 StartGuardThe abrupt DC system voltage drop that accompanies engine starting can cause micro-processor-driven electronics aboard vehicles or vessels to "dump" programmed memory. StartGuard solves these problems by providing supplemental power to sensitive electronics while the engines are cranking. Newmar&';s NS-12-20 StartGuard supplies backup power for electronics during engine start. MountingMount the StartGuard in any convenient location, such as under the dash or console, using the four mounting screws provided or #10 bolts.WiringInput from the power source to the electronics must be routed through the StartGuard. Specifications: Input Voltage: 13.8-14.8 VDC nominal, 15.5 VDC Max Relay Activation Input Voltage: 7-15 VDC Output: 20 Amps Max Battery: 12 VDC, 4.0 Amp/Hour, Sealed Rechargeable, 3-5 Year Life (Typical) Backup Capacity (Fully Charged): 20 Amps for one minute/18 Amps for 2 minutes Operating Temperature Range: 0-40 degrees Celsius Winter Storage Temperature Range: -20 degrees to +40 degrees Celsius Dimensions: 8.25" x 4.9" x 3.5" Weight: 5.5 lbs This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.