Downloaded the bt notification app from playstore and installed it. the functions are working as given in the product page and description on the pack. i can hear music, see my contacts and sms, can call from the watch, receive calls hands free, could take photos using my phone using the watch. i have a little calls to make and receive in a day. so the battery last for the day with 50% display brightness and 15sec screen time out. it says 6 hours of music play, but i could only play music with full volume continuously for 1 hour and 15 min. for normal volume the time can be more. for this price range its performance will be more than that you expect .