Features of FOXSUR 8 Amp Fully Automatic Smart Charger Microprocessor Control (CPU). 3 STAGE AUTOMATIC CHARGING. 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.. Switchmode technology: Yes Polarity protection: Yes Output short protection: Yes Non battery link protection: Yes Over voltage protection: Yes Over temperature protection: Yes Cooling: Fan Input voltage: 100 240V AC, 50 60Hz Rated output: 12V 8A 24V 4A Minimum start voltage: 2.0V Battery range: 12V: 6Ah 150Ah 24V: 6AH 100AH Thermal protect: 65'C+/ 5'C Efficiency: App. 85 Percent. Compliant standards: CB,CE, IEC60335, EN61000, EN55014 Dimension (L×W×H): 170×98×58mm Weight: 560g Package Includes: 1 x Smart battery charger 1 x Charger manual 1 x Packing box 1 x Storage bag Warm Tips: Adaptation: 12V/24V universal. Battery connection: red clip clip battery positive (+), black clip ( ). Turn off the power source before connecting or disconnecting to the battery. FOXWER car battery charger is covered with a protective film. After removing the protective film, you will see a brand new screen.