1、Circuit Protection: Has built in protection against short circuits and bad connections, and will automatically restart after a power failure. 2、Charging Characteristics: With 1A 2A 3A 4.5A charging characteristics, it can be automatically selected according to battery capacity or charging level. 3、Winter Mode: Winter mode for standard battery 12V or AGM 12V, can be used at 5℃ or lower ambient temperature. 4、Battery Failure Display: The battery voltage resolution is 0.1V, indicating battery polarity reversal, battery failure or connection problem. 5、Reliable Operation: Built in anti spark and overheating device, and has IP65 protection level, the operation is safer and more reliable. Item Type: Car Battery Charger Product Model: SM3-WP-5 Battery Type: Standard battery, AGM, GEL Protection Level: IP65 (dustproof and waterproof) Double Insulation: Yes Battery Capacity: Minimum 1.2Ah, maximum 120Ah 1 x Charger 1 x O Ring Wire 1 x Crocodilian Clip Wire 1 x User Manual