Insert the AAA batteries in the battery panel under the scale and close the cover. Install the app on your phone using the QR code you'll see on the scale's manual. Next, using Bluetooth, pair the scale to your phone. You can pair it to any device that uses Bluetooth 4.0 and above. Then, follow the prompts on the app, register, and start using the scale to measure your body metrics.
Make sure your smart scale is on a hard, flat surface to avoid inaccurate readings. Don't put it on carpet or a rug. Keep it in a dry spot so the cables and electrical parts don't get wet. The glass will be slippery if it's wet, so if it's a bit steamy, dry it before using. Don't use harsh cleaning products on your scale.
Stand with both feet evenly on the scale to prevent it from tipping up. If you have shoes or socks on, it won't be able to take your readings. So stand on the scale with bare feet. It's a good idea to weigh yourself at the same time every day. First thing in the morning would be an excellent choice.