Each of these watches is Bluetooth® SMART, which makes it possible to establish aconnection with a smartphone to control various phone features from your watch.The big rotary switch at 3 o’clock can be used to jump between songs, controlthe music volume, or adjust sound attributes with an equalizer function. Withthe song title search function, the touch of a button lets you look up the title of asong playing in your location and display it on the watch. You can even use thewatch to produce a variety of different sound effects on your phone.