Keep Smart Fitness Tracker B4 (CN version)

The Keep Smart Fitness Tracker B4 offers advanced health and activity monitoring. It features an ergonomic curved design, real-time dual blood oxygen and heart rate tracking, and monitors fat burning during exercise. With 50m water resistance, a vibrant color OLED screen, magnetic charging, and scan code payment, it's designed for a comprehensive fitness experience. (CN version)

Wristband Material: Silica gel Host model: other Certified Model: B4 model: B4 National subsidy registration model: B4 Payment function: Scan code to pay IoT smart ecosystem products: yes water proof: 50 meters Screen display: color Heart rate monitoring: Real-time monitoring Blood oxygen monitoring: Real-time monitoring Blood pressure monitoring: Does not support blood pressure measurement For people: General Product Size: 1mm high Power supply mode: Magnetic charging AI voice function: Does not support AI voice function NFC function: No NFC function Sports Recognition Function: Outdoor walking Message reply: Message reply not supported