They are GPS devices and are pretty accurate. If you are asking if you can leave the inside of your house and go into your yard, yes, you can. However don't wander off too far (if you own a large property or farm) or it will sound an alarm in the monitoring location.
There are several devices that can monitor blood alcohol concentration when a person is confined to home.
A birdfeeder is a device placed outdoors to supply food for birds.
a device placed outdoors to supply food for birds
The word you're looking for is "confinement." A confinement device is designed to restrict or limit movement, often used in various contexts, such as in safety equipment or animal control. Other terms that can also apply include "restraint" or "detainer," depending on the specific context.
A Passive InfraRed Sensor (PIR)
To obtain an accurate reading of air temperature, factors to consider include the location of the measurement (indoors/outdoors), proximity to heat sources or direct sunlight, time of day, elevation, and potential factors that may influence the accuracy of the measuring device.
To determine the memory size of a device, you can calculate it by multiplying the number of memory cells by the size of each memory cell. This will give you the total memory size of the device.
Check that device manager recognizes the device with no errors or warnings.
To determine the amount of electricity consumed by a device or appliance, you can use a device called a wattmeter or check the device's power rating in watts and the time it is used to calculate the energy consumption in kilowatt-hours.
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This varies on what wireless device you use. A typical wi-fi home router using 802.11b or 802.11g with a stock antenna might have a range of 32 m (120 ft) indoors and 95 m (300 ft) outdoors. The new IEEE 802.11n however, can apperently exceed that range by more than double (nearly 200m)
Sextant