COMPREHENSIVE SAFETY - This portable battery jumper starter has 8 integrated protections including reverse polarity, reverse connection, overcurrent, overvoltage, overload, overcharge, over discharge, and short circuit protection. Ensure your trip is safe and smooth.PORTABLE & COMPACT - With an overall size of 7.9*4.5*3.7" and a item weight of 0.95 lbs, it is very easy to store in a car or a travel bag. Compared with bulky lead-acid jump starters, this compact jump starter brings more convenience and peace of mind to your trip.5-IN-1 MULTIFUNCTION - This device functions as a jump starter, portable power bank, and an LED flashlight with 3 modes (flashlight, strobe, SOS). The Lithium Battery Jump Starter is your reliable, all-around trip companion here to gear you up for every adventure.Additional Tips - Please check the manual for more information before using. Professional Technical Support Team - If you have any questions about the product, feel free to contact us! Our California-based support team will respond within 24 hours.TIP FOR WINTER USE - To prevent battery performance issues in cold conditions, please store the jump starter at a proper temperature. Avoid charging or using the jump starter in extreme cold.