Features: Dual battery isolation protection controller, which automatically detects and identifies the system voltage after the isolator is powered on. High current 150 Amp, Universal application 12V/24V, LCD display voltage of two batteries. This compact battery isolator was built small (127mmX147mmX43mm) to fit almost anywhere! VOLTAGE SENSITIVE RELAY: The Automatic 150 Amp Dual Battery Isolator is all you need to charge Two Battery Systems. Voltage Sensitive Relay (VSR) cuts in at 13.5 volts (27V) and cuts out at 16 volts (32V) to ensure your primary battery is always charged and ready to start your vehicle. It's like having two separate power sources for each battery while only having one alternator! Battery Isolator fits for a wide variety of vehicles - Suitable for 12V/24V Jeep, Trucks, ATVs, UTVs, Boats, RVs, Vans, Off-road Vehicle, Caravan & Camping Applications. Don't need to drain the original battery on your vehicles trying out your new devices when off-roading, the dual battery isolator will be a nice solution. This ensures your primary battery is always charged and that you don't get caught stranded ever again. With this dual battery isolator, no worries of engine cannot be started when original battery out of power, just pressing the emergency button to turn on the auxiliary battery to start the engine. Easy-to-Install for the most novice DIYer. Specifications: Input Voltage: 12V/24V working voltage and load voltage Continuous Current: 150A normally open Peak Current: 150A normally open Automatic Connection Voltage: 13.5V-16V (12V) / 27V-32V (24V) Automatic Disconnection Voltage: 12.5V, immediately disconnect if below 12.5V Over Voltage: 16V/32V Size: 127mmX147mmX43mm /5.8 x 5 x 1.7inch Colour: Black material: metal Package Contents: 1 x 150A Dual Battery Isolator 1 x User's Manual Only the above package content, other products are not included. Product Notes: Please allow a little manual errors.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please confirm acceptance before ordering. About Shipping: Please ensure your shipping informations are correct to avoid delivery issues. All orders are shipped within 3 days after payment. Delivery usually takes 8–12 days, The specific delivery time is depend on circumstances. If you have any questions during your purchase, feel free to contact us. We will respond you within 24 hours.