The Pump Plus kit includes a charger, a display and an auto pump. This kit provides a complete vehicle charging system at an affordable price. Kussmaul Pump Plus 2000 PLC Charger Output: 12 Volts, D.C. Output Current: 15 Amperes Maximum Voltage Sense: Remote, Electronic, no Sense Wires Required Battery Saver: Output Voltage: 12 Volts D.C. Output Current: 3 Amperes Maximum Power Indicator: Indicates Input Power Applied Battery Saver Overload Indicator: Indicates Battery Saver Load Exceeds 3 Amperes Charger Output Indicator: Remotely Located Bar Graph Display, Indicates State of Charge Condition of Battery Warranty 3 Years Kussmaul Dual Bar Graph Display Kussmaul Auto Pump 12 Volt 100 PSI Max Rating, 12V, 11A Vehicle Mount Compressor Ensures Truck Air Brake System is Properly Pressurized For Immediate Dispatch From Station Pressure Switch Regulated Operation Automatically Senses Low Pressure in Air System & Restores Proper Pressure, Preventing Brake Lock-Up No Interference With Engine Mounted Air Compressor Factory Set PSI Actuation Points: 75 "On", 95 "Off" With Adjustment Differential 20 PSI Sealed Ball Bearings For Long Service Life Compact Size 1 Year Warranty