Bolt Power D28A 500 Peak Amp Portable Jump Starter with Air Compressor Capacity: Built-in 13,600mah power bank with (12v / 16v / 19v) DC output Feature: built-in super bright LED flashlight with three mode (high, strobe and SOS) Phone saver: dual USB output offers 1a and 2.1A that can delivers the fastest charging speed Design: Compact slim portable jump starter with 400 amp peak can start a dead car battery Protections: Over current protection, short circuit protection, overload protection, over-voltage