Mechanical by SmartHeart. Details:The SmartHeart Analog Body Weight Scale offers reliable, battery-free performance with a 286 lbs / 130 kg capacity, perfect for daily weight tracking. Featuring a large 10.5” x 10.5” non-skid platform and a clear 3.5” x 2” dual-unit display in pounds and kilograms, this mechanical scale is easy to use and built for accuracy.