Features: This is a fully automatic battery charger with 3 charge stages.Automatic charging protects your battery from being overcharged. So you can leave the charger connected to the battery indefinitely.3-stage chargers are suitable for most battery types including Calcium, Gel and AGM, Wet batteries. They may also help restore drained and sulphated batteries.Types of batteries: Most types of lead acid batteries including Calcium, GEL and AGM, Wet,EFB, etc.Output short-circuit for protection. Reverse connection for protection. Package Includes:1x Car Battery Charger Specifications:Material:ABSSize:As Picture ShownColor:Red/YellowPlug specifications: European standard/British standard/U.S. standardCooling: Natural cooling Input voltage: 100-240V AC, 50-60Hz Rated output: 6V 2A / 12V 2A Minimum start voltage: 7.0V Battery range: 4Ah - 40Ah Thermal protect: 65'C+/-5'C Efficiency: App. 85%. Compliant standards: CE, IEC60335, EN61000, EN55014 note:1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.