1、This is a automatically car battery charger which can charing the battery based on battery\u0027s condition! It uses the MCU controller for save \u0026 fast charging service for your battery! 2、Constant current mode: When the voltage of the battery is lower than the value set by the charger, the charger will work under the constant current mode and supply the 3、Constant voltage mode: Using the pulse width modulation(PWM) tech to control the charging current and output voltage of the charger which ensures the battery is fully charged and avoids over charging. 4、Floating charge mode: When the voltage of the battery is approaching the value of the constant voltage mode, and the current will cut down to the given current gradually, that means the battery power is full, then the pilot lamp will turn green and the fan will stop working. The charger will turn the mode into floating charge mode automatically. At this moment, the battery can be stopped charging or keep on floating charge for half an hour. 5、Suitable for car motorcycle Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia