Product Description Function: This digital bathroom scale helps you more accurately track your body changes, monitor your health, and weight fluctuations at any time. Specification: Item Type: Smart Scale Product Size: Approx. 30 x 26 cm / 11.81 x 10.24 inches Weighing Range: Approx. 3 ~ 180 kg / 6.6 ~ 396.8 lbs Power: 4 AAA batteries (not included) Function: Measures muscle rate, water, visceral fat, bone mass, fat index, BMI, body age, obesity, body score, fat mass, basal metabolic rate, mass value, protein, water content, obesity, muscle mass, lean body mass, and 17 other body data. How to Use: 1. Battery Installation (not included): Install the battery for the first time, paying attention to the correct orientation of the positive (+) and negative (-) terminals. 2. Install Mobile Application: A. Turn on Bluetooth on your phone. B. Ensure your phone has a stable internet connection (Wi-Fi, 3G, or 4G recommended). C. Download and install the app, or search for "OKOK" to find and download the app. 3. Link Devices, Register, and Input Your Information. 4. Data Measurement: A. To ensure weighing accuracy, place the scale on a hard, flat surface. Avoid placing it on carpets or soft surfaces. Ensure there are no foreign objects on the bottom before weighing. B. Stand barefoot on the scale, maintaining good contact with the sensing area during measurement. As body fat calculation requires contact, do not step off the scale if the measurement time exceeds 5 seconds. 5. View Measurement Results. Package List: 1 x Smart Scale