CHARGEGUARD Select is the newest version of the original automatic shutdown device and is much more than an on/off timer for mobile electronics. It's an easy-to-use intelligent vehicle power management system that prevents dead batteries, protects mobile electronics from voltage anomalies, and gives you peace of mind. With CHARGEGUARD Select, equipment is always available, and you never have to remember to turn it on or off. What CHARGEGUARD Select Delivers: Higher Productivity Equipment is on when you want it on - leave unattended with no worry. Reduces down time caused by service calls. Lower Maintenance Costs Prevents battery wear and tear. Saves battery replacement costs. Reduces service calls and aids in troubleshooting. Reduces fuel cost by not needing engine on to run equipment. Features: Easy-to-set timeout delay switches. Choice of sensing modes: Automatic Detection, Battery Sensing (DC Rise), or Ignition. Override/test button provides 15 minutes of electronics power. Voltage diagnostic LED indicates status with color/blink codes. High (18V) and low (11V) voltage disconnect. Reverse polarity protection. MIL-STD-810F Tested. Rugged, durable construction.