Sound Alarm - A sensitive device for fishing, the alarm will notify you once fish bites LED Indicator - When fish bite, the bright blue LED light works at the same time. It is a design for night fishing Adjustable alarm sound, no damage to the rod, not fall off the rod Exquisite design, easy to carry, easy to install , attaches easily to most fishing rods Perfect for night and day fishing, especially in complete darkness, this electronic detector can be even more valuable since it not only emits sound but also turns on the blue light when the fish strikes or runs to inform you New design, improved, big improvements: 1. Updated for alarm sound adjustment, you can adjust alarm sound 2. Fastening buckle and strap: Easy installation and suitable for all rods. 3. Powerful Battery Cells: Up to 100 hours of endurance Features: Material: ABS plastic Color: Black Dimensions: 2.56" x 2.17" x 1.18" Package: 3 x Fishing Rod Alarms (3 pcs LR44 batteries for each alarm included)