Smart Watch FT50 Body Temperature Monitor Thermometer Bracelet Wrist Band Fitness Tracker ECG Heart worth to buy? Thanks for it if those of you who have purchased Smart Watch FT50 Body Temperature Monitor Thermometer Bracelet Wrist Band Fitness Tracker ECG Heart could share about what you think of the product. I would love any extra info, as it is quite pricey as $19.99 and I just want to know it is good before paying for it.