16800m Ah 4USB Multi-Function 12V Car Jump Starter Power Bank Rechargeable Battery Feature: Shortcircuit, over-charge, andover-heatprotection, verysafe. Afterfullychargedonetime, cankeepaboutmonths. Noramlusecankeep 3-5years. Startcaratonetimeoncoldhotareas. Veryconnvenient.canbechargeathome (100-240V)andcar. Normallyuse 3hoursforfullcharge. Byusingourfreeconnector, youcanuseittoprovidepowerforyourcarrefrigeratororother 12 Velectronics likecarcleaner. Safetyhammerforknockglasswhenmeetemergency. Specification: Type Portable Car Jump Starter Color Black Capacity 16800m Ah Actual Capacity 16800m Ah Uselife 3-5 Years USBOutput 5V/2 A Laptop Output 15V/16V/19 V Input 12V/1 A Starting Current 300 A Peak Current 600 A Operating Temperature-20~+60 C Host Weight App 500g Set Weight App 1.2kg Size App 170*80*30mm (L*W*H)3LEDModel SOSmodel Fastflashingmodel Lighting Model Howtouse: Connectredclamptopositivewire, blackclamptonegativewire. pleasemakesurethereisenoughcontact surfaces. Plugintobatteryhole, pleaseplugintotheend. Switchbuttonto ON, then Preestheroundpowerbuttoon, andgotoyourcartostart. Afterstartyourcar, pleasetakeofftheclampin 30S. Howtouseourproductshighqualityledlighttorchfunction?1. Makesurethereisatleastonepowerindicatorlightingonthepowerbank 2. Switchbuttonto O Nthenlongpressthepowerbuttonabout 3secs 3. Thenyoucanpresspowerbuttontochangemodes (SOS/ Fastflashing/ Lighting) Thisjumpstarterhave 3 LED light, brighterthan 1 LEDjumpstarteror 3 LEDjumpstarterbutonly middleonehavelight. Howtouseourproductsredblinklightfunction?1. Makesurethereisatleastonepowe