If you look at the manual linked on the Specifications tab, to pair your android phone you must download an .apk file outside of the safe harbor of the Google Play or Amazon app stores. This should be warning enough but it has been reported that that app will send information to an unknown Chinese IP address.
Be afraid. Be VERY afraid
Waste of money. Time and date won’t set, no clock faces available, a plethora of problems. Use the money to buy dinner… It’ll last longer and make you happier