Xiaomi Redmi Watch 4

Xiaomi Redmi Watch 4
Security Grade A+ Calculator v1	Redmi Watch 4 Brand: Redmi (Parent: Xiaomi) Category: smartwatch • Model / Gen: 4 M2314W1 Release Date: 2023-11-29 • Status: In sale Classification Date: 2025-10-17 • Official Website

Security Evaluation

1. Device Security

Criterion	Value	Proof	Comment
Known hardware tampering	None	🔗 Proof
Known vulnerabilities	None	🔗 Proof
Prior attacks	None	🔗 Proof
Updatability	Very common	🔗 Proof
Category Score	Score: 1 / 3

2. System Security

Criterion	Value	Proof	Comment
Authentication with other systems	Full	🔗 Proof
Communications	Encrypted with up-to-date encryption	🔗 Proof
Storage	Encrypted with up-to-date encryption	🔗 Proof
Category Score	Score: 1 / 3

3. User Authentication

Criterion	Value	Proof	Comment
Account management	Full	🔗 Proof
Authentication	Secure	🔗 Proof
Brute-force protection	Exist	🔗 Proof
Event logging	Access event logged	🔗 Proof
Passwords	Require change after setup with complexity requirements	🔗 Proof
Category Score	Score: 1 / 3

Technical Specifications

Property	Details
Operating System & App	Xiaomi HyperOS (Companion App: Xiaomi Sports Health)
Hardware (CPU / GPU)	CPU: MediaTek MT2735 (a low-power processor optimized for entry-to-mid-range smartwatches, focusing on balanced performance and battery efficiency) • GPU: Integrated GPU (paired with MediaTek MT2735, designed to handle basic graphical tasks like UI rendering and simple fitness app animations)
Memory & Storage	Memory: 1GB LPDDR (sufficient for smooth operation of pre-installed apps, notifications, and real-time fitness tracking functions) • Storage: 8GB eMMC (supports storing offline music, local app data, and historical fitness records)
Power, Battery & Charging	Battery: 500mAh lithium-ion polymer battery. Typical usage: up to 14 days; heavy usage (frequent fitness tracking, notifications): up to 7 days; GPS continuous tracking: up to 30 hours • Power: Typical power consumption: ~2.5mA (idle mode); ~12mA (active heart rate monitoring); ~75mA (GPS + multi-sport mode) • Charging: Magnetic USB-C charging (magnetic 吸附 design for easy alignment). Charging time: 0-100% in approximately 65 minutes; 10-minute fast charge supports up to 2 days of typical use
Display & Camera	Display: 1.43-inch AMOLED round display. Resolution: 466×466 pixels (326 PPI); Brightness: up to 500 nits (peak); Color gamut: 100% DCI-P3; Protection: 2.5D Gorilla Glass 3 (scratch-resistant) • Camera: No built-in camera (consistent with Redmi Watch series positioning, focusing on fitness and daily utility rather than imaging functions)
Sound & Connectivity	Sound: Built-in speaker (supports call audio, notification alerts, and voice feedback) and microphone (supports voice calls and voice commands via the companion app) • Connectivity: - Bluetooth 5.3 (for pairing with smartphones and wireless earbuds) - NFC (supports contactless payments via Mi Pay and access card simulation) - GPS/GLONASS/Galileo/QZSS (for accurate outdoor sports location tracking) - Wi-Fi: Not supported (to prioritize battery life, consistent with its entry-level positioning) - Sensors: Heart rate sensor, SpO2 (blood oxygen) sensor, blood pressure monitor, sleep monitor, 5ATM water resistance (suitable for swimming)
Physical (Dimensions & Mass)	Dimensions: 47.58×41.12×10.5 mm • Mass: Approximately 31.5g