Indestructible Revean Carbon Heating System,with patented carbon heating system it can heat up within minutes from 15 degrees to 45 degrees,high-medium-low settings allow for a totally personalized level of warmth.Stop guessing what the weather will be like, and be prepared for any temperature with our power-operated heated blanket. Battery and Charge,the battery can be fully charged within 3.5-4 hours, and it can heat the blanket for 4 hours at low setting, 3 hours at mid setting and 2 hours at high setting. This multifunctional power bank(12000mAh) can also be used as LED flashlight, S.O.S lighting signal, charge your mobile devices and jump start your vehicles. Patented Du-Pant Sorona Insulation with Rip-stop 20D Nylon shell make it durable and warm enough on its own Measures 80 inches by 54 inches when laid out flat, providing plenty of coverage for just about anyone who wants to wrap up in it Lightweight and Compressible,weights only 4.5lbs and can be easily reloaded in the included compression sack, It helps lighten the load of your pack for long trips and save room to spare for other gear. Bacically like straight sleeping bag without a zipper, which can offer you more aireflow.