This is a fully automatic battery charger with 3 charge . 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 , Wet batteries. They may also help restore drained and sulphated batteries. Types of batteries: Most types of lead acid batteries including Calcium, GEL and , Wet,, etc. Switchmode technology: Yes Polarity protection: Yes Output short protection: Yes Non battery link protection: Yes Over voltage protection: Yes Over temperature protection: Yes Cooling: Natural cooling Input voltage: 100-240V AC, 50-60Hz Rated output: 6V 2A / 12V 2A Minimum start voltage: 7.0V Battery range: 4Ah - 40Ah Efficiency: App. 85%. Compliant standards: , IEC60335, EN61000, EN55014 Dimension (LxWxH): 130x75x50mm Plug Type: UK plug,it applies to Malaysia, the United Kingdom and so on. Material:plastic colour:Yellow Package Contents: 1 * Car Battery Charger Only 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.