ABS with stainless steel contacts. Capacity 150kg/23st 6lb. Compact. Button start. 12 user memory. Low battery warning feature. Measures body water and body fat. 33mm LCD display. Athlete and child mode. BMI. Size (H)4, (W)27, (D)27cm. Requires 2 CR2032 long life lithium batteries (included). Manufacturer's 15 year guarantee.