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Amazon Echo devices have Sidewalk enabled by default and do not inform their owner about it. The feature can be disabled via the official app. [10] A number of prominent news publishers, including The Guardian, [13] ArsTechnica, [11] CNET, [14] PCMag, [15] Click2Houston, [16] and Bleeping Computer, [17] expressed concern with opt-out nature of the network and published guides how to disable ...
In March 2016, Amazon unveiled the original Amazon Echo Dot, [51] which is a hockey puck-sized version of the Echo designed to be connected to external speakers due to the smaller size of the onboard speakers, or to be used in rooms such as the bedroom as an alternative to the full-sized Echo. Despite its smaller form factor, the Amazon Echo ...
Amazon Alexa, or, Alexa, [2] is a virtual assistant technology largely based on a Polish speech synthesizer named Ivona, bought by Amazon in 2013. [3] [4] It was first used in the Amazon Echo smart speaker and the Amazon Echo Dot, Echo Studio and Amazon Tap speakers developed by Amazon Lab126.
Amazon Echo Show is a smart speaker with a screen that is part of the Amazon Echo line of products. Similarly to other devices in the family, it is designed around Amazon's virtual assistant Alexa, but additionally features a touchscreen display that can be used to display visual information to accompany its responses, as well as play video and conduct video calls with other Echo Show users.
Charger for a plus-minus net fence. An electric fence is a barrier that uses electric shocks to deter humans and other animals [note 1] from crossing a boundary. The voltage of the shocks may cause discomfort or death. Most electric fences are used for agricultural purposes and other non-human animal control.
A tracking transmitter broadcasts a radio signal which can be detected by a directional antenna (typically a Radio Direction Finder). By rotating the antenna one can determine the direction the signal lies in and of course whatever it may be attached to. The EPIRB is an example of a similar device.
The signal strength of radio waves decreases the farther they travel from the transmitter, so a radio station can only be received within a limited range of its transmitter. The range depends on the power of the transmitter, the sensitivity of the receiver, atmospheric and internal noise , as well as any geographical obstructions such as hills ...
In radio communication, a transceiver is an electronic device which is a combination of a radio transmitter and a receiver, hence the name. It can both transmit and receive radio waves using an antenna, for communication purposes. These two related functions are often combined in a single device to reduce manufacturing costs.