1、Multiple adjustments, 3 sensitivity modes, 4 tone modes and 5 volume modes are very useful and can meet your different fishing requirements. 2、The alarm size is 90x50mm/5x2in, British standard M3/8in copper screw, equipped with a 5mm socket, used to illuminate the descending indicator. Please note that it is normal for the fish bite alarm to have a collision sound when shaking; because this is a requirement for product function design. 3、The power supply is 1x9V battery power supply (not included). Although the 9V battery is a general‑purpose battery, there may still be batteries of different sizes; compatible size: 89x02x0.67 inches/8x6x7cm, Please make sure that the 9V battery you are buying is not too big/smaller than this size. 4、In order to prevent the design of falling, the battery is a little tight as soon as it is put in, but a stick tool can easily help. 5、There are 1 output speaker and 4 bright blue LED indicators on each alarm, sound and light alarm, multiple monitoring, do not miss any chance. Work at night is perfect, no need to keep staring at the buoy. 3 x Bite Alarm3 x Rocker1 x Storage Box Item Type: Fishing Bite AlarmMaterial: PlasticAlarm: 1. 3 x LED 2. LED indicator 3. LED auto switch on in night (Press "V" for 3 seconds) 4. Special fall back function: different LED color and sound 5. T button controls 4 levels 6. V button controls 5 levels (includes "mute" level) 7. S button controls 4 levels 8. Socket for bite alarm 9. Battery: 2 x 9V 6LR61(Not included)Rocker: 1. Stabilize fishing line to make alarm more accurate 2. Compatible with 4mm or smaller glow stick (Not included)Weight: Approx. 420g/ 14.8oz