Hello Dr. Yu 

For our loyal super users, we and amazon have come together to give away 30 iClever BoostCare Kids Head Phones for free. All you need to do is click the amazon link below and you will get the announcement right after the click. https://giveaway.amazon.com/p/8c95845d09cbce5d-ovc8c2g0

This giveaway will be expired after Oct 30, 2016 11:59 PM PDT, amazon will ship your prize directly to you. If you want to informed about our weekly giveaway, exclusive offers, coupons, Please follow us on our social media. Any questions about the giveaway? Send an email to support@iclever.com Sincerely Chris