📄 Product Description – Mi Body Composition Scale S400
A smart body composition scale with higher accuracy powered by dual-frequency BIA (bioelectrical impedance) to capture more reliable data on fat, water, and muscle. One measurement generates a report of up to 25 health indicators, and it can measure static heart rate during weighing. It connects to the Mi Home/Xiaomi Home app via Bluetooth Low Energy 5.0 for detailed reports, supports multiple measuring modes (baby/pet holding mode, guest mode with no data storage, balance testing), and even supports small object weighing.

⭐ Key Features:
– 🔹 Model – MJTZC01YM
– 🔹 Analysis method – Dual-frequency BIA (50kHz / 250kHz)
– 🔹 Body fat accuracy reference – Correlation coefficient ≥0.93 vs DEXA for key metrics (e.g., body fat % and fat mass)
– 🔹 25 indicators – Body weight, Heart rate, BMI, Body score, Body water content, Body hydration, Body fat percentage, Fat mass, Protein mass, Protein rate, Muscle mass, Muscle rate, Bone mineral mass, Bone mineral rate, Visceral fat rate, Basal metabolic rate, Lean body mass, Body type, Estimated waist-hip ratio, Body age, Skeletal muscle mass, Weight control, Muscle control, Fat control, Standard weight
– 🔹 Measurement range – 0.1kg to 150kg
– 🔹 Minimum division – 0.1kg
– 🔹 Units – kg, lb
– 🔹 Heart rate – Static heart rate monitoring (toggle via the app)
– 🔹 Modes – Baby holder mode, Balance testing, Guest mode (no storage), Small object weighing (0.1kg–10kg)
– 🔹 Users – Stores up to 36 users | Suitable for ages 6–80 (under 6 and over 80: weight only)
– 🔹 Wireless – Bluetooth® Low Energy (BLE) 5.0
– 🔹 Supported app – Mi Home/Xiaomi Home (Mi Fitness not supported)
– 🔹 Auto sync via gateway – Supports Bluetooth® gateway sync (gateway sold separately)
– 🔹 Battery – 3×AAA | observed up to 180-day battery life (under specific test conditions)
– 🔹 Dimensions – 300 × 300 × 24.55mm
– 🔹 Net weight – 1.45kg
– 🔹 Materials – Reinforced glass + engineering plastic
– 🔹 Operating temperature – 0°C to 40°C
– 🔹 Design – 58mm electrode pad + enlarged 40mm anti-slip surface

🎯 Closing Paragraph:
If you want a feature-rich smart scale that delivers advanced body composition insights with multi-user support and convenient app reports, the S400 is a strong family-friendly choice with dual-frequency BIA and multiple measurement modes.

⚠️ Important Note:
Body composition readings can vary with hydration, timing, and posture—measure consistently (same time of day) for best tracking.