Feature: 1. The relay has a heavy duty silicone sealed interior with a reinforced shell that protects the isolator from water damage and dust contamination, and prevents your isolator from harsh conditions. 2. The smart battery isolator is capable of smart charging, allowing you to use a separate battery to run your accessories when the engine is off, preventing the starting battery from being depleted by the device. 3. The VSR battery isolator of the relay can ensure that your main battery is always fully charged without worrying about getting stuck on the road due to the exhaustion of the battery. 4. The isolator kit is easy to install, does not require an alternator or ignition connection, and you do not need any additional components to complete the installation. 5. This is an IP65 certified relay that can be used for off road purposes, is shockproof and dustproof, and can be used safely in harsh conditions. Specification: Item Type: Voltage Relay Material: Resin Nylon Copper Purpose: Voltage Sensitive Relay Rated Voltage: 12V Continuous Current: 140A Turn On Voltage: 13.3V Cut Off Voltage: 12.8V Features: Over Temperature Protection and Automatic Induction Voltage. Package List: 1 x Smart Battery Isolator1 x Red Cable1 x Black Cable2 x Positive Marine Battery Terminal1 x Negative Marine Battery Terminal1 x Insulated Blue Ring Terminal2 x Insulation Sleeve Red1 x Insulation Sleeve Black6 x Nylon Cable Tie2 x Heat Shrink Ring4 x Screw3 x Copper Terminal3 x Washer1 x English User Manual Note: Do not use outside the voltage and current range.