608HR 0.66 inch OLED Touch Screen Display Bluetooth Intelligence Heart Rate Smart Bracelet, IP67 Wat worth to buy? Thanks for it if those of you who have purchased 608HR 0.66 inch OLED Touch Screen Display Bluetooth Intelligence Heart Rate Smart Bracelet, IP67 Wat could share about what you think of the product. I would love any extra info, as it is quite pricey as $29.20 and I just want to know it is good before paying for it.