SME's Rechargeable Hand Warmer and Flashlight features dual temperature settings; high 118.4 F, low 39.2 F, built-in led light and a rechargeable 4400mAh li-ion battery. It has USB output to charge portable devices and provides short circuit, overcharge and over discharge protection. The led light features a blinker mode and charge time is three hours. Included is a USB charging cable.