Ron Thompson MC4W 3+1

Compact bite indicator 7.8 cm high
Simple multicolor selection (color selectable)
Volume, tone, sensitivity and color adjustable

You get:

Receiver individually
Radio bite alarm individually
1 + 1 set (1 radio bite alarm + 1 receiver)
2 + 1 set (2 radio bite indicators + 1 receiver)
3 + 1 set (3 radio bite indicators + 1 receiver)
4 + 1 set (4 radio bite indicators + 1 receiver)

     Up to 4 individual bite indicators can be connected to a receiver, so you can easily expand a 2 + 1, 3 + 1 set later.
     Radio range receiver approx. 150m
     Batteries are not included!
     Bite indicators are operated with 23A -12V 1 piece, not included in the scope of delivery.
     Receiver is operated with 3AAA - 1.5V 3 pieces, not included.
     Standby time 6 months