Three-color led indication green led = on
amber led = low battery
red led = alarm
controls power switch (audible / off / silent)
interference elimination switch
tuning automatic
audio frequency 2 khz warble
operating temperatures -35o f (-37o c) to 158o f (70o c)
width 3.25" (8.3 cm)
thickness 1.625" (4.1 cm)
length 16.5" (42 cm)
total weight 17.6 oz (500 g)
u.s. trademarks 1,754,933 and 3,236,345
battery requirements one 9v (included). provides up to 100 hours of normal operation.