[Comprehensive Health Monitoring]Equipped with ECG, SpO2, heart rate, and body temperature sensors for comprehensive health tracking [Advanced Fitness Tracking]Features 20and sport modes, automatic step counting, and detailed metrics including calories, distance, and pace [Sleep Analysis]24/7 sleep tracking with detailed sleep stage analysis, including REM detection and sleep apnea monitoring [Bluetooth Calling]Supports Bluetooth 5.3 for hands-free calling directly from your wrist [Long Battery Life]250mAh battery provides 5-7 days of regular use and 20and days on standby Specifications: Model GE50 Physical dimension 45 x 30 x 11mm APP H Band CPU JL7013A Blood oxygen chip VP556ER blood oxygen heart rate and analog front end ECG chip VP556ER Optoelectronic chip VP556ER Heart Rate (Dynamic accurate dual PD Heart rate Acquisition) Flash 128Mb Acceleration sensor HR|ECG|Spo2-VP556ER Gsencor sensor ROM KXTJ3-1057 (Acceleration and Gyroscope) BT Bluetooth LE 5.3 Charging mode Magnetic charging Water proof IP67 waterproof Battery capacity 3.8V 250mAh polymer battery Range: 5-7 days Standby time: 20-30 days Frame material Zinc alloy plating process Bottom shell material PCandABSand Medical 316 steel sheet Band material <td style="wid