?Free 2 AAA Batteries & Tape Measure -- We provide you 2 free batteries, so you can use the scale immediately when received it. When your baby/pet is too big to be measure length/height on tray, the tape can work it. ?Comfortable and Safe Tray -- The rounded curve matches the concave design, making your baby more comfortable without worrying about the baby sliding out of the tray. With the 2 swivel lock, you can easily lock it with the scale. It’s stable and safe. ?Powerful Multi-Function 2-1 Digital Baby Scale -- This 2-1 baby weight scale can measure weight of pets, babies, adults accurately. When weighing baby or small pet, you can use scale with tray to ensure them are got right feeding, track weight gain. With the height measurement inside the tray, you can monitor the pet's/baby's height. Once baby/pet outgrows the tray or want to weighing big pets/adults, take off the tray, it will be a standard scale. ?High Precision Sensors -- Four high-precision sensors make your measurement infinitely accurate. Precision up to ±0.02lbs(10g), Max:220lbs. Our infant scale has 4 switchable weighing modes(lb/kg/oz/lb:oz), Tare function, Touch button ON/OFF, HOLD function. The Hold function keeps the accurate weight numbers not be fluctuate on display even if pets/infants move too activity. ?Bluetooth Baby Scale -- The built-in Bluetooth device can easily connect with the mobile phone application “Baby Fit”. When weighing the baby, you can record the weight data in the app. The APP will automatically generate a graph from the historical data and compare the WHO Children's Weight Growth Standards. You could also add the information of all your family members in the APP, and all their weight data will be recorded in the APP, so that you can easily check the weight changes.