Voltage Display: With a voltmeter which will display the real-time voltage.If you connect 2 batteries, then the voltmeter will display the battery that has high voltage.High low pressure protection: Circuit will be automatically disconnected so as to protect the main battery from over discharging.Automatic & Manual Model: Ensure the main battery is always charged. Very convenient and safe to use.Application: Camper van trucks, caravans, UTV/ATV, boat, marine, bus, and camping applications etc. Rating Voltage: 12VContinuous Current: 140ACut-in Voltage: 13.3VCut-out Voltage: 12.8VIP Waterproof Rating: IP68Cut-Out Delay: 3-5 SecondsCharing Currunt: 90-120APM CONTINUOUS, 160AMP PEAKCurrent DRAW: CHARGING 250mA,STANDBY 10mAPROTECTION SURGE(SPIKE)Terminal Studs: M6(1/4inch)Colour:Photo ColorMaterial: Plastic Package Contents:1x Smart Dual Battery Isolator kit Only the above package content, other products are not included.Note: Light reflection 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.