BOOSTER BATTERY JUMP STARTER - Rated at REAL 4120-amps, the YJS40 can safely jump start all 12V vehicles,It can achieve 60 times jump-start on a single charge, and works even in extreme climate -4~140. DSLI IV INTELLIGENT CONTROL TECH - DSLI IV reassembling of the battery structure and microcomputer control program, the voltage is increased by 30% up to 14.8V, the peak current of the starting current reaches 4120A thus reaching 1 second Start the car, VERSATILE CHARGING OPTIONS - Jump pack built-in USB, USB QC and Type-C in/output ports. and a DC port to power any DC devices. LED FLASHLIGHT - The LED work light has 3 modes: Flash Light, Strobe Light, and SOS Light. This multi-purpose flashlight is great for camping, outdoors, indoors, travel, etc. Advanced Design - The new YJS series jump starters are made of fire-proof ABS material, which is more sturdy and durable for adventurous life, and have multi-function (rain, dust and drop resistance).