Rechargeable Pocket Warmer in Silver Lightweight and compact Switch it on, slip it into the knit sleeve, and place it in your pocket for comforting warmth in one minute Also functions as a power backup for your cell phone, charging it up to 50% Warms up to 104 degrees Fahrenheit Can be recharged over 500 times Aluminum shell for thermal conductivity Recharge unit in 1.5-2.5 hours with included USB cable Single Use Duration: 2-3 hours
