B3 Plus 0.96 OLED Bluetooth Earphone Wristband Talk Smart Band, Support Blood Pressure & Heart Rate worth to buy? Thanks for it if those of you who have purchased B3 Plus 0.96 OLED Bluetooth Earphone Wristband Talk Smart Band, Support Blood Pressure & Heart Rate could share about what you think of the product. I would love any extra info, as it is quite pricey as $51.00 and I just want to know it is good before paying for it.