LED Light DesignThe split charge relays with a red LED indicator and allows the split charging of a second battery without discharging the primary battery or the start battery. Easy to UseSimply connect the relay between your starter battery and leisure battery and the relay takes care of everything, making sure your starter battery is not drained for when you need to get going again. Product FunctionThe voltage sense relay simply detects the rise in voltage from you vehicles charging system to allow you to charge your leisure battery(s) while your engine is running. When your engine is switched off, the relay will isolate your leisure battery(s) from your main starter battery. So it does not drain your main starter battery and you will always be able to start your vehicle. Easy to InstallVoltage sense systems are especially suited for modern vehicles with bus controlled wiring as this type of kit does not need an ignition feed or any additional wiring and are very simple kit to install, all you need to do is to connect your starter battery to your leisure battery(s) by using the kit supplied, with very easy to understand fitting instructions and a wiring diagram. Widely UseThis type of kit is suitable for Camper Vans, Motor homes, 4x4s, Day Vans, Mobile workshops,Cars or Boats. Features This type of kit is suitable for Camper Vans, Motor homes, 4x4s, Day Vans, Mobile workshops,Cars or Boats. Voltage sense systems are especially suited for modern vehicles with canbus controlled wiring as this type of kit does not need an ignition feed or any additional wiring and are very simple kit to install, all you need to do is to connect your starter battery to your leisure battery(s) by using the kit supplied, with very easy to understand fitting instructions and a wiring diagram. The voltage sense relay simply detects the rise in voltage from you vehicles charging system to allow you to charge your leisure battery(s) while your engine is running. When your engine is switched off, the relay will isolate your leisure battery(s) from your main starter battery. So it does not drain your main starter battery and you will always be able to start your vehicle. Packing Included 12v 140amp Intelligent Voltage sense Split Charge Relay with Digtial LED Voltimeter Display 2 x 0.25 metre red 70amp cable from Battery to fuse holder leads(Lead terminals pre-crimped) 1 x 0.5 metre red 70amp cable Relay to fuse holder lead(Lead terminals pre-crimped) 1 x 2/4/6 metre(according to 3m,5m,7m kits) 70amp Relay to fuse holder lead(Lead terminals pre-crimped) 1 x 1 metre 70amp of Black earth cable(Lead terminals pre-crimped) 1 Pair 8mm Post Type Battery Terminals 2 x MTA MIDI Fuse holders 4 x 60A MTA MIDI Fuses including 2 spares. Red&Black Heat shrink to protect all the connections. 10 x Cable ties 10 x adhesive cable tie fixings base to keep everything tidy. 15 x fixing screw Note: 1.Please check as much as possible to make sure the item is the one that you need. 2.Due to manual measurement, please allow a small amount of error.