No batteries needed - automatic power generation control. Powerlifter - weighs from 5 kg up to 150 kg/330 lb/23 st. By the gram - accurate digital system with 0.1 kg/0.2 lb graduations. Easy to use - simply push the button to generate power and activate the scale. Always readable - large LCD display. Discreet - automatic power off. No slipping, no scratching - non-slip protective caps. Easy to clean - glass surface. Problem-free use - 5 year guarantee and service. More sustainable choice - 94% recyclable after use.