10 Safety Protection Intelligent Jumper Clips - Our jump box clamps have 10 types of protection (reverse polarity, reverse charge, anti-spark, short circuit, overcharge, overcurrent, overvoltage, overload, low temperature, high temperature). A light reminds you if the link is correct and ensures safe use.This portable jump starter is designed to work in extreme weather conditions, from -4℉ to 140℉ Fahrenheit, ensuring that you can use this emergency jump box in any weather condition. 4000A powerful & Durable Car Jumper - Our 4000A jump start battery pack quickly starts 12V cars and supports up to 8L gas or 4L diesel engines. Even at extremely low battery voltages (below 9V), a simple push of the "BOOST" button will help to reignite the engine. 150PSI Smart Cordless Digital Inflator - This easy-to-operate jump starter with air compressor is equipped with smart presets, pressure monitoring, and auto-stop. Its bright LED display shows tire pressure in real time and offers three unit optio