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2. Electronic gear-shifting system - Wikipedia

   en.wikipedia.org/.../Electronic_gear-shifting_system

   A wireless system that can be retrofitted onto any bicycle was announced in 2016. [12] The front and rear derailleurs remain in place, while a wireless gear-change controller is added to the handlebar, with configuration of the system via an iOS/Android app, and customization can be added to the button controllers via the Bluetooth app. [13]

3. Astro (Motorola) - Wikipedia

   en.wikipedia.org/wiki/Astro_(Motorola)

   They began testing of ASTRO portable radios, mobile radios, base stations, dispatch consoles, and a wide-area system in December 1992 for State Police Troop A, and completed a phased installation several years later. [8] This original ASTRO system was later converted to ASTRO 25. Today, ASTRO 25 is widely used for public safety communications. [9]

4. Land mobile radio system - Wikipedia

   en.wikipedia.org/wiki/Land_mobile_radio_system

   A land mobile radio system (LMRS) is a person-to-person voice communication system consisting of two-way radio transceivers (an audio transmitter and receiver in one unit) which can be stationary (base station units), mobile (installed in vehicles), or portable (handheld transceivers e.g. "walkie-talkies").

5. Comparison of radio systems - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_radio_systems

   World radio systems (Terrestrial) System Type Modulation Data rate Sidebands? Ch. Bandwidth Radio spectrum Sound Codec Digital subchannels SFN Metadata/RDS/RBDS; AM radio: Analog radio: Amplitude Modulation: N/A? 18–20 kHz: 148.5-283.5 kHz (Longwave) 510–1610 kHz (Europe) 510–1710 kHz (USA and Canada) N/A: N/A: No: None Motorola C-QUAM ...

6. Trump win has economists concerned US economy will fail to ...

   www.aol.com/finance/trump-win-economists...

   Retail sales once again topped estimates for the month of October, GDP remains strong, the unemployment rate continues to hover at around 4%, and inflation has moderated despite its bumpy path ...

7. Trunked radio system - Wikipedia

   en.wikipedia.org/wiki/Trunked_radio_system

   A trunked radio system is a two-way radio system that uses a control channel to automatically assign frequency channels to groups of user radios. In a traditional half-duplex land mobile radio system a group of users (a talkgroup ) with mobile and portable two-way radios communicate over a single shared radio channel, with one user at a time ...