Wireless Digital Fishing Alarm Fishing Bite Alarms Fishing Receiver Sound Alert Kit Led Alarm Indicator with Case Transmitter: Transmitters have over 100m transmission range with special encoded frequencies. 16LED light on each transmitter, for drop/back, speed setting, direction. The bite alarm will send out warning beeps when the rod leaves. Adjustable sensitivity, volume, tone button, LED bright, drop back with different sound. 256 variable code enough to prevent interference from another angler. High visibility LED latching about 20 seconds, LED alarming signals with high output speaker. Fixed bolt with adjustable screw and extra plug for illuminated swinger. Receiver: Transmitters have over 100m transmission range. 4 different color LED light to match 4 different alarms. On/off, adjustable volume, vibration button. Vibration, LED alarming signals with high output speaker. Memory LED, night light, powered by a 9v battery(not included). Portable zipper padded case stores all contents, convenient to carry around. Bite alarm size: 11.5 x 5 x 4cm / 4.5 x 1.9 x 1.5in Receiver size: 11 x 5.5 x 3cm / 4.3 x 2.1 x 1.1in Colour: black Material: ABS+ electronic Package Contents: 1 * Receiver 4 * Fishing Bite Alarms 1 * Storage box 1 * English manual Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.