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2. Standards for Alarm Systems, Installation, and Monitoring

   en.wikipedia.org/wiki/Standards_for_Alarm...

   The Underwriters Laboratories' UL 365 is a safety standard that governs the construction, performance, and maintenance of police station-connected burglar alarm units and systems. These systems are designed primarily for use in mercantile premises, including mercantile safes and vaults, as well as bank safes and vaults.

3. PMR446 - Wikipedia

   en.wikipedia.org/wiki/PMR446

   PMR446 radios use frequencies that in Australia, the U.S., and Canada are allocated to amateur radio operators, and military radar systems. [ 6 ] Instead, the U.S., Canada and Mexico use the Family Radio Service (FRS) system, which provides a similar service on different frequencies, around 462 and 467 MHz.

4. Professional mobile radio - Wikipedia

   en.wikipedia.org/wiki/Professional_mobile_radio

   Professional mobile radio (also known as private mobile radio (PMR) in the UK) are person-to-person two-way radio voice communications systems which use portable, mobile, base station, and dispatch console radios. PMR systems are based on such standards as MPT-1327, TETRA, APCO 25, and DMR which are designed for dedicated use by specific ...

5. Voice-activated radio-dispatched alarm - Wikipedia

   en.wikipedia.org/wiki/Voice-activated_radio...

   A voice-activated radio-dispatched alarm, or VARDA-alarm, is a type of burglar alarm that, when activated or "tripped", broadcasts the type of the alarm and the transmitter location over the local police radio frequency using a pre-recorded audio message. [1] In 1968, the voice-activated radio dispatched alarm (VARDA), was invented.

6. TETRA - Wikipedia

   en.wikipedia.org/wiki/TETRA

   Terrestrial Trunked Radio [1] (TETRA; formerly known as Trans-European Trunked Radio), a European standard for a trunked radio system, is a professional mobile radio [2] and two-way transceiver specification.

7. 35 of the very best outdoorsy gifts for hikers, hunters and ...

   www.aol.com/lifestyle/best-outdoorsy-gifts-for...

   This small waterproof tool packs a bunch of life-saving essentials into it, including a 5000mAH power bank, an emergency radio with AM/FM/NOAA weather radio tuning, a flashlight, an SOS alarm.