Celestrons Elements ThermoCharge 6 Handwarmer and Charger provides two useful tools in one compact package, making it the perfect addition to your hunting pack. Delivers hours of heat so you can keep your hands toasty all day long, plus it can even charge your electronic devices via its USB port. Ergonomic aluminum body with Power Curve design enhances heat transfer to keep your trigger finger limber. IP65-rated water resistance combined with dustproof and shock-resistant design stands up to rugged adventures. C-Link allows it to connect with additional Celestron power banks to extend heat times. Auto charge begins recharging the unit upon being plugged in. Lithium-ion battery (included) provides up to eight hours of handwarming power. Comes with 550 paracord strap with carabiner, soft carry bag and USB charging cable. Temperature range up to 114F. 4.05 H x 2.02 W x 0.96 D. Wt: 5.9 oz. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Hand Warmer/Charger Combos.