[Product Information]

• 2 S4 Power Plus Battery Packs， with four cells and one 1 Recharger (back compatible with e and m series Battery Packs)
• 2 Heating Elements，1 pair of Cambrelle Covers and Strips， and 1 pair of Hotronic’s One Size Fits All – Heat Ready Insoles.
• Keep feet warm inside ski boots or easily transfer to other footwear
• Three base level settings for maintaining warmth， and a fourth setting offers an extra blast of heat
• The new S series batteries offer more than ever before， including enhanced reliability， longevity， and performance