Lechal Smart Navigation and Fitness Tracking Insoles and Buckles, Unisex, Large Navigate hands-free without looking at your phone, even when offline. Get detailed route guidance through simple vibrations and patterns. Track your fitness accurately by measuring steps taken, calories burnt, distance travelled and much more. Use Lechal Pods in trim to fit insoles or just lace up the buckle into your sneakers. Battery life of up to 15 days on a single charge. Sync data with Apple Health and/or Google fit app