New Mijia Body Fat Scale S400 Pro 3.5in TFT Color Screen Bluetooth5.1 Smart Home Body Compo…

Mijia Body Composition Scale S400 Pro is more than a basic weight scale. It uses dual-frequency bioelectrical impedance at 50 kHz and 250 kHz to estimate body-composition metrics, while the large ITO-coated glass surface acts as the measurement area. Xiaomi reports a 0.1–150 kg weighing range and support for a broad range of household users.

A 3.5-inch TFT colour display can show more information directly on the scale than a simple numeric panel. Through Xiaomi Home, the display content can be customised and body-composition trends can be reviewed over time. The system provides up to 25 metrics in the app, including weight, BMI, body-fat percentage, muscle-related values, body water and visceral-fat level.

Bluetooth is used for direct connection to Xiaomi Home, and the scale can also work through a compatible Bluetooth gateway for cloud synchronisation. It can store measurement records locally when a phone is not connected, then sync later. Xiaomi documents support for multiple user profiles, making it practical for a household rather than a single person.

Body-composition values from consumer BIA scales are estimates and should be used for trend tracking, not medical diagnosis. Hydration, recent exercise and foot contact can change readings. The scale is useful when the same measurement routine is repeated consistently and the app is used to watch longer-term changes rather than overinterpreting one reading.