Capacity:   600 lb x .2 lb / 270 kg x .1 kg * Platform Size:  18  x 14  / 457 mm x 356 mm * Width between the rails at the top 27-1/2  * Shipping Weight: 70 lb / 32 kg * Power: AC adapter or 6 C size alkaline batteries * Weight Display: .7  / 18 mm high-contrast  7-segment LCD with Body Mass Index * On/Off button * Lb/Kg  * Hold/Release  Zero  Automatic Zero * Options:  115 VAC  60 Hz adapter (with 6' (1.8m) power cord for long term stationary operation)