The new and improved HotRox rechargeable hand warmer and powerbank is double sided and holds heat even better. Hot Rox usb hand warmers heat up in 15 seconds. The two heat settings give 3 hours of heat on the high heat setting or 6 hours of heat on the medium heat setting HotRox electric hand warmers are simple, safe and easy to use, this new model has been ergonomically designed and sits comfortably in the palm of your hand. It is the perfect shape for your hand and has a smooth tactile design Hot Rox hand warmers also act as powerbanks giving two full charges to all USB smartphones and acts as a portable charger. HotRox usb hand warmers can recharge any product that uses 5V USB. The powerbank feature works when the HotRox is off. Simply use your normal mobile USB charge lead and plug into the USB socket at the base of the HotRox. The HotRox has a 3 LED power level indicator and when all the lights go out the unit needs recharging. Charging typically takes from two to four hours depending on charge rate Dual heat plates for all round comfort Two heat settings giving 3-6 hours heat Power bank function for mobile back up Cosy palm design Easy to operate