GTX 1.3inch Full-round Touch Screen 24h Heart Rate Blood Pressure Oxygen Monitor Music Contorl Weath worth to buy? Thanks for it if those of you who have purchased GTX 1.3inch Full-round Touch Screen 24h Heart Rate Blood Pressure Oxygen Monitor Music Contorl Weath could share about what you think of the product. I would love any extra info, as it is quite pricey as $49.92 and I just want to know it is good before paying for it.