Feature:1. The 250Amp battery isolator is a main battery saver used to combine two batteries when the alternator is charging (engine running)2. Isolate the two batteries when not charging (engine off) so that you can still start the vehicle3. Easy to install, only the power cord in and out. No need to try new equipment off road to discharge the vehicle's original battery4. Using magnetic latching relay, will not generate heat for a long time. Ultra low power consumption, quiescent current is less than 0.3mA, can be used for a long time5. Input voltage is 12V/24V working voltage and load voltage, peak current for 250A normally openSpecification:Item Type: Dual Battery Smart IsolatorMaterial: Aluminum alloyPurpose: Dual battery isolation relayColour: BlackInput Voltage: 12V/24V working voltage and load voltageContinuous Current: 250A normally openPeak Current: 250A normally openAutomatic Connection Voltage (delay 5 seconds): 13.5V-16V (12V working voltage), 27V-32V (24V working voltage)Automatic Disconnection Voltage (delay 5 seconds): 12.5VOvervoltage: 16V/32VSize(LxWxH): Approx. 152 x 147 x 40mm / 6 x 5.8 x 1.6in.Package List:1 x Dual Battery Smart IsolatorNote:1. Please do not put the product under water.2. Do not use outside the rated voltage and current range.