The Baby Scale has 5 Units, great choice for families with Infants/Toddlers or Pets. Adopts night vision LED screen, it's clear and easy to read even in the evening or dark environment. The bottom fixation design provides a comfortable and stable weighing platform for the baby/pet. Please center your pet on the tray and keep it as still as possible to get an accurate measurement. Please center baby on the tray and keep him/her as still as possible to get an accurate measurement. For Best Accuracy: Use on hard, flat surfaces ONLY. Do NOT use on carpets or rugs ATTENTION:Before first use, please ensure the battery insulation strip is fully removed. If the screen displays "Lo," it's a simple reminder to replace batteries for continued performance. What's the capacity of the baby scale? Momcozy digital baby scale has a huge range of load capacity from 0.1lb/50g-330lb/150kg(Max), suitable for baby, infant, toddler, pet and adult. The height measure(60cm/23.6 inch) on the tray is convenient for recording the baby's height and weight. Can I change the unit of measure? Momcozy baby scale has 5 units for your choice: lb: oz, oz, lb, g, and kg. Easily press the "UNIT" button to choose the unit you want. Can I see the weight value in any way? Yes, the scale has clear LED screen and reading perspective switch function, long press the "UNIT" button to change the view. It's convenient to read whether weighing the baby/pet or yourself. Why is my scale showing different weights each time? A: This typically happens if the scale is moved between weighings or used on a rug. For 100% accuracy, please place it on a hard floor and wait for it to "Auto-Zero" (show 0.000) before stepping on. The scale won't turn on after I put batteries in. Is it defective? Please check if the small plastic insulation strip inside the battery compartment has been removed. Also, ensure the batteries are aligned with the "+" and "-" markings as guided in our manual.