Lucana New Fish Bite Alarmis easy to use and take ,You only need to clamp it on the fishing rod and the spring protects the surface of the rod....Please see the reference picture and the "Z" shape. Turn on the switch and the alarm start to work . When the fish bite the hook with the lure and the line moves that will make the "Du Du Du" voice, especially in the night alarms with LED . This quality product has got the approvement of the patent, easy to get fish .