Keep B4 Smart Fitness Tracker with Heart Rate & Blood Oxygen Monitor (CN version)

Track your health and fitness with the Keep B4 Smart Fitness Tracker. Featuring real-time heart rate, blood oxygen, and sleep monitoring, along with a built-in pedometer and 5ATM waterproofing, it's perfect for various sports including swimming. Enjoy up to 14 days of battery life on its 1.58-inch display. (CN version)

Host model: other Payment function: Scan code to pay water proof: 5ATM Heart rate monitoring: Real-time monitoring Power supply mode: Magnetic charging Satellite positioning: other model: 10003136 Extreme battery life: 14 days Blood oxygen monitoring: Manual measurement Certified Model: 10003136 Product Size: 1mm high Sports Recognition Function: swim NFC function: No NFC function Blood pressure monitoring: Manual measurement For people: General Standard battery life: 14 days