Bought a few for guests to use with my backup pod. Have controls for tone and volume. LEDs are very bright. Lost one of the knobs for tone adjustment. Very tight tolerance given for access to the 9v location, which can be extremely difficult to open. Had two get stuck out in a sudden downpour and stopped working. Have to tear apart and inspect as to if they are savable or not. Good alarm for the price if taken care of.

After years of method fishing and being eye-glued on the rod tip I decided to try a bite alarm. Living in the southwest, using this alarm will allow this septuagenarians to attend the rod from remote shade during dog-day sessions. The 9v battery installation is “push-in” rather the the usual snap-on type of connection and the tolerance is tight so the battery must be properly positioned for successful insertion. No instruction sheet is included, but I suspect the ease-of-use makes it unnecessary. The “latching LED” remains on for about 20 seconds, and there is a mini audio type port on the bottom of the unit to support accessories? So far, over multiple sessions the unit has performed well, and, given delivered durability, will represent an extraordinary value.