Each of the three 30 x 25-mm TRIP-30 Series audio alerts produces its own unique sound output: a slow pulse, a fast pulse, or a continuous and slow pulse. The transducers are priced under $1. The ...

WASHINGTON — Around 2:20 p.m. Eastern Time (or a little closer to 2:18 p.m. Eastern) on Wednesday, Oct. 4, millions of cellphones, TVs and radios across the country sent out an alert as part of a ...

Malicious intruders have hijacked US radio gear to turn emergency broadcast tones into a profanity-laced alarm system.… That's according to the latest warning issued by the Federal Communications ...