The shoe heater Wireless HotSole from Alpenheat provides cozy warmth - and exactly where it matters: on the feet. When it's bitterly cold in winter, freezing starts in the outermost limbs. There, blood circulation and body temperature decrease first - with the consequence that at least the well-being, at worst even the health suffers.The 3-stage adjustable heating power of the cordless soleplate is regulated by pushbutton on the radio remote control and offers a good heating performance with a heating duration of up to 9.5 hours. The heating element is located in the toe/bale area. The rechargeable battery is built into the sole.The high quality POLIYOU® foam sole has special features such as excellent breathable quality, optimal ventilation, good moisture absorption, has an antibacterial effect and helps prevent athlete's foot. The soft insole provides improved comfort, but is still made of a very durable material. It keeps the feet pleasantly warm.Optimal for use when hunting, fishing, riding, hiking, skiing, snowboarding, cycling, etc.Other product details:Scope of delivery: 2 insoles with integrated heating element, 1 USB charger, remote controlHeating time: 3-9.5 hours (depending on heating power)Rear sole thickness 16 mmRemote control with 3-stage adjustable heating powerRechargeable Li-Polymer batteries 3.7 V / 1.8 Ah / 6.7 WhCharge time: approx. 4-5 hours.