An updated version of the popular Dynamic wireless alarms, The MK2 come with multifunctional settings to suit whichever way you prefer to get bite indication.  The set boasts:

• 7 multicoloured LEDs
• Micro adjustable sensitivity
• Volume and Tone control
• 20 second latching LED on alarms and receiver
• Vibration mode
• Black snag bars included
• Night light functions
• Low battery warning
• Rolling code function – avoiding interference from other alarms
• Anti-Theft feature.  The receiver will sound if any alarm is turned off before the receiver.
• Waterproof and impact resistant construction
• Output jack for illuminated indicators
• 100-150m range
• ABS receiver stand and alarm covers
• Each alarm requires a 9v battery and the receiver requires 3 x AAA batteries (not included)
• https://youtu.be/xijWHccL0Co