m4 smart bracelet heart rate blood pressure tracker ip67 waterproof bluetooth 0.96 inch wristband smartband health monitor pk mi band 4

description: 0.96in color screen display, clear to see even under sunlight, monitor your sports informations at all times, ip67 waterproof, you can wash hands when you wear it or wear in the rain, but it's better not wear it to swim. features: 1.high sensitive touched screen, can achieve various operations, information content, step, calories, distance, weather, heart rate and other functions to quickly view, thus opening intelligent life.