K9 1.3 inch IPS Color Screen Smart Wristband Smartwatch IP68 Waterproof, Support Call Reminder worth to buy? Thanks for it if those of you who have purchased K9 1.3 inch IPS Color Screen Smart Wristband Smartwatch IP68 Waterproof, Support Call Reminder could share about what you think of the product. I would love any extra info, as it is quite pricey as $31.50 and I just want to know it is good before paying for it.