It is powered by normal or rechargeable batteries and includes a speaker, earphone jack, and detachable antenna. There are also multi-band scanners which cover much more than just the aircraft bands.ДЄ handheld scanner usually includes a belt-clip and wrist-strap for convenience. The HF band is not restricted to line-of-sight radio transmissions and can be used to monitor Shanwick and the trans-Atlantic routes etc. Some scanners can receive the HF (short wave) aircraft band in addition to the VHF and UHF aircraft bands. In order to listen to the Red Arrows leader at an air show you would require the UHF band.Д«oth VHF and UHF are short range, line-of-sight radio transmissions which are restricted to a maximum range of about 200 miles due to the curvature of the earth and usually considerably less depending on the surroundings (hills etc). These scanners can receive military aircraft transmissions as well as civilian. More expensive models allow you to receive the UHF aircraft band (225-400MHz) in addition to the VHF aircraft band. The cheaper scanners can receive just the VHF aircraft band (108-137MHz) which is ideal if you want to listen to civilian aircraft transmissions. You can get either a hand-held scanner, ideal for air shows etc, or a larger desk top/base station model. There isn't any frequency overlap that you get on the cheaper Air-band radio. Click here to view Airband Scanners and accessories at Amazon.ДЄ scanner, while more costly (about ВЈ70 and more), usually consists of a keypad to enter a particular frequency, LCD display, a memory which will remember stored frequencies, and the ability to scan through a certain set of frequencies. The cheaper air-band radio is usually able to pick up transmissions from civilian aircraft but are limited by the absence of accurate tuning so you have little idea of what frequency you are listening to and you are often tuned into more than one frequency at the same time. Many handheld Air-band radios/scanners are available today costing from just a few pounds to several hundred pounds.

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