Must-haves for winter, the ActionHeat(TM) Adult Rechargeable Heated Insoles are perfect for anyone with cold feet. The easy-to-use controller has 3 heat settings, reaching up to 130deg and lasting up to 8+ hours. These insoles feature built-in, ultra-fine heated panels strategically placed under the toes to keep your feet warm and toasty. Fit Cut to size with simple guidelines for a perfect fit Technology Deodorized material keeps your feet feeling fresh USB charging cable LED light power indicator Design 3.7 volt battery heated insoles Ultra-fine heating panels strategically placed under the toes Thin and lightweight design for maximum comfort Wireless remote control with 3 heat settings Lasts up to 8+ hours on a single charge Reach up to 130deg F Includes dual micro-USB charging kit with wall adaptor