Bone View Pocket Warmer w/Power Source Black. Full-grip heating with two temperature settings: Low and High. Indicator lights display remaining power as well as heat settings. Features an LED flashlight and USB port for charging other products. Rechargeable 7200mAh lithium-ion battery with up to 500 recharge cycles lasting 6-8 hours between charges Specifications for Bone View Pocket Warmer w/Power Source: Manufacturer: Bone View Color: Black Package Contents: Bone View Pocket Warmer w/Power Source Hand-warming battery pack gets HOT quickly and last up to 8 hours. Full-grip heating with two temperature settings: Low and High. Indicator lights display remaining power as well as heat settings. Features an LED flashlight and USB port for charging other products. Rechargeable 7200mAh lithium-ion battery with up to 500 recharge cycles lasting 6-8 hours between charges