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Bluetooth is a short-range wireless technology standard that is used for exchanging data between fixed and mobile devices over short distances and building personal area networks (PANs). In the most widely used mode, transmission power is limited to 2.5 milliwatts, giving it a very short range of up to 10 metres (33 ft).
MTC 3600 SmartNET/SmartZone 4.1 Controller (Prime & Remote) PSC 9600 Astro25 6.x Site Controller (Remote Sites) MTC 9600 ASTRO25 Site Controller (Prime Sites) GCP 8000 ASTRO25 Site Controller (Prime & Remote Sites) MZC 3000 SmartZone 4.1 Zone Controller (4.1 Master Sites)
The antennas contained in mobile phones, including smartphones, emit radiofrequency (RF) radiation ( non-ionizing "radio waves" such as microwaves ); the parts of the head or body nearest to the antenna can absorb this energy and convert it to heat. Since at least the 1990s, scientists have researched whether the now-ubiquitous radiation ...
Most Bluetooth headsets implement both Hands-Free Profile and Headset Profile, because of the extra features in HFP for use with a mobile phone, such as last number redial, call waiting and voice dialing. The mobile phone side of an HFP link is Audio Gateway or HFP Server. The automobile side of HFP link is Car Kit or HFP Client.
Headphones are a pair of small loudspeaker drivers worn on or around the head over a user's ears. They are electroacoustic transducers, which convert an electrical signal to a corresponding sound. Headphones let a single user listen to an audio source privately, in contrast to a loudspeaker, which emits sound into the open air for anyone nearby ...
A20 Aviation Headset. The "A20 Aviation Headset" was released in 2010 as the successor to the "Aviation Headset X" (aka A10). [ 39][ 40] It has a claimed battery life of 45 hours (using two AA batteries) or can be powered by the airplane's electrical system. There are two versions, one with Bluetooth and one without.
QuietComfort 25. Bose QuietComfort 25 with mounted 3.5 mm headphone jack, and carry case. The "QuietComfort 25" (QC25) over-ear headphones were sold from 2014 until 2019. The "QuietComfort 25" (QC25) over-ear headphones were released in 2014 [ 36] as the replacement for the QuietComfort 15.
Digital Enhanced Cordless Telecommunications ( DECT) is a cordless telephony standard maintained by ETSI. It originated in Europe, where it is the common standard, replacing earlier standards, such as CT1 and CT2. [ 1] Since the DECT-2020 standard onwards, it also includes IoT communication. Beyond Europe, it has been adopted by Australia and ...
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