1. Simple installation, suitable for medium-sized voltage-sensing split charging relay systems for safely charging 75A to 120A leisure batteries.2. The voltage sensing relay only detects the voltage rise in the vehicle charging system, allowing you to charge the leisure battery while the engine is running.3. When the engine is off, the relay will isolate your leisure battery from the main starter battery. So it won't drain the main starter battery and you will always be able to start the vehicle.4. This kit is suitable for camper caravans, RVs, 4x4s, Day caravans, mobile workshops, cars or boats.5. Increase solder joints to enhance heat dissipationType: Voltage Sensitive RelayContinuous current: 140AMaximum current: 160ACurrent consumption - charging: 280mACurrent Consumption - Standby: 8mABreakaway Delay: 5-10 secondsRecommended fuse: 80AmpColour: black+redMaterial: plastic+metalPackage Contents:1 x 12V 140A voltage detection split charging relay1 x cable 30cm black1 x Cable wire 30cm red wire1 x cable wire 60CM red wire3 x 16-6 terminals2 x nylon sticker2 x red heat shrink tube1 x The small black wire terminal in the isolator4 x Fixing screwsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.