CHARGE GUARD 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 CHARGE GUARD Select, equipment is always available, and you never have to remember to turn it on or off. Features Microprocessor Based Selectable Timeout Delay Choice of Sensing Modes: Automatic Detection Mode (AC) Isolated Alternator Detection Voltage Rise Detection (DC only) Direct Ignition Mode (HL) Emergency Override Shutdown Pre-warning Hi & Lo Voltage Disconnect Reverse Polarity Protection Specifications Operating voltage (nominal) 13.8V Low voltage disconnect 11V High voltage disconnect 18 V Stand-by current 15-20 MA Operating current 80-85 MA Load current rating 30 Amps Minimum time delay 5 sec. or 15 min. Selectable time delay 1-16 hrs. & Infinity Factory default time setting 2 hrs Length 4” Width 3.75 “ Weight 5 oz.