Motorola S305 - Manual (Page 12)

Playback controls on your headphones can be used when listening to music from
a Bluetooth-enabled music player that also provides remote control capabilities
(AVRCP).
control your tunes
Press — previous track
Press and hold — rewind
If remote music control is not supported by your music player, music should be
controlled from your music player.
Note: With some music players, previous track must be pressed twice to go
back to the previous song. Refer to your music player's manual for specific
control features.
Press — next track
Press and hold — fast-forward
Press — play/pause music
Press and hold — stop music