4 WIRELESS FISHING BITE ALARMS WITH REMOTE RECEIVER. THEY ARE ADJUSTABLE FOR VOLUMNE, SENSITEVITY, TONE. THE RECEIVER WITH TELL YOU WHICH ALARM IS GOING OFF AND WILL WORK UP TO 100 YARDS AWAY. THE ALARMS TAKE 9 VOLT BATTERIES AND THE RECEIVER TAKES 3-AAA BATTERIES. COMES IN A PADDED ZIPPERED CASE. THE ALARMS HAVE BUILT IN SNAG BARS SO YOUR ROD DON'T FALL OFF.