Flash Sale Alert! You can now buy NO.1 F4 Heart Rate Smartband from Gearbest.com for only 17.99 USD with free shipping world …

NO.1 F4 smartband is a device that makes you live in healthier and more intelligent lifestyle. It helps to monitor basic physical …

After F3 Smartwatch, No.1 is going to release F4 Smartband model, this is IP68 waterproof and it includes Multi Sport Mode: you …