NGT VS Twin Alarm and receiver set

2 alarms , 1 wireless receiver.
Wireless range up to 200m
Vibrating receiver.
Rolling code system (prevents interference between sets.)
4 screw in snag bars 9 included. 2x20mm and 2x75mm
Variable tone.
Variable volume.
Waterproof.
Latching 20 second LED
Long life LRV08 battery
Receiver requires 4 x AAA batteries