Hotronic e4 Foot Warmer

• m4 comes with all you need to customize your ski, snowboard or hiking boots using insoles of your choice
• Kit includes two battery packs with heat regulators, one pair of heating elements with coverings, and a recharger with American and European adapters
• High-capacity, rechargeable batteries are designed for cold-temperature operation; battery packs attach outside for easy operation
• Features four temperature/durations settings
• Setting level one heats from 83° to 89° F (28° to 32° C) for 19 to 21 hours
• Level two heats from 96° to 106° F (36° to 41° C) for seven to nine hours
• Level three heats from 105° to 116° F (40° to 47° C) for five to 6.5 hours
• Level four: 135° to 144° F (57° to 62° C) for 2.5 to 3.75 hours
• Level four, which can be used in three-minute intervals or continously, is meant for a burst of heat; CAUTION: Using longer may result in burns
• Battery pack LEDs indicate whether power is on or off and selected heating level; lights blink when heating level four is selected to run continuously
• Advanced charging technology prevents overcharging

Imported.

Insoles are not included in the kit; use those that come with the boots or select from insoles sold separately. Temperature ranges and durations are based on battery packs at minus 4° F (minus 20° C).