... 100% safe *•Pocket designed,convinient for travel* •Intelligent Temperature Control System, Supplying Pulsed-type heating during 45-60°C, ... stainless steel surface, larger warm area* •Efficient mobile power function, high charging transformation rate, it can charge iPhone4 ... •protection and temperature protection (about 3 hours charging to Power Bank& Hand Warmer fully)10.Input:7.4V,550MA, ...