1,Low frequency constant current does not hurt the car. Efficient and fast charging, saving time. 2,Battery Repair: Restore battery capacity by repairing, extend battery life, and improve battery performance. Portable and easy to use: compact and lightweight, easy to carry and use, suitable for outdoor travel and vehicle maintenance. 3,New Intelligent and Safe Design, Overheat and Current conservation. Designed with battery check and repairing, charging function, under ARM architecture designed PCB, automatically switches working mode and wonu0027t get hot even over 72 hours charging. 4,RC10 equips is with advanced battery charging and pulse repairing function, which is capable of charging all types of lead-acid automotive, marine, and deep-cycle batteries, including flooded, GEL, AGM Lithium Batteries from 4AH-150AH with an output 12V 10A/ 24V 5A. 5,red clip clamp battery positive electrode, black clip clamp battery negative pole. 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.