A satellite phone is a type of communication device similar to a cell phone, but instead of sending signals to a land-based cell tower, the satellite phone sends signals to an orbiting satellite. It is useful for communicating where cell phone reception is not possible, though renting satellite phones can be quite expensive. The first … Read more
Early forms of holography and photography have a lot in common, as they are based on the same basic principles. Both holography and photography record images on chemically-treated film, often containing a silver halide coating. They are also both processes that utilize the reflected light from objects, and this directly affects the resolution of an … Read more
You choose the best designer headset by finding the style that sums up your style and personality. This can be based solely on looks or by brand awareness. It can even be summed up by choosing a designer headset that is totally unique or by making your own. The best designer headsets are ones that … Read more
Choosing the best VHS tapes often depends a great deal upon how you plan on using the tapes and the amount of video you want to record onto them. How you plan on using the tapes is important because there are a number of distinct formats of VHS tapes available, and the best one often … Read more
There are many different types of phone recorders, so you will need to take the specific application into account when trying to choose the best one. Phone recorders can be bulky and use microcassettes as the recording medium, or very compact with digital storage. Some devices are capable of recording four or more phone lines … Read more
A field-effect transistor (FET) is a three-terminal device that can control the amount of electricity allowed to pass through. FET transistors are able to switch or control electricity very rapidly. Some field-effect transistors are able to handle large amounts of electric power, making it useful in a wide variety of electronic and electrical equipment used … Read more
Smart cards are cards with embedded chips that are used for security or for saving profiles, such as for worker identification badges or library cards. Smart card software is made to interact with these cards, by either producing the cards or reading the data from them. Most smart card software is similar, but each program … Read more
A receiver amplifier is a home theater component that performs the two basic functions of switching between different inputs, and amplifying audio signals before they are routed to loudspeakers. Receivers typically have a number of different inputs for both video and audio signals, and outputs for televisions and speakers. These devices often have both digital … Read more
Access denial is a security tool used to limit access by persons who may be unauthorized. It uses an automated algorithm to determine if a user has permission to access a given resource or area. If the user does not, the system issues a warning about the access denial. The user may be able to … Read more
There are many different types of cell phone gadgets, but the most popular are hands-free devices, cases, and phone skins. Many of these products can be found easily on the Internet and are generally inexpensive. Before buying any cell phone gadgets, the buyer should research the product to ensure that it is compatible with his … Read more
HD radio is a brand name, and it should not be confused with HDTV. It doesn’t refer to either high-definition radio or satellite radio. This type of radio broadcasting allows AM and FM stations to broadcast digitally, instead of merely using an analog signal. This technology is being used by radio stations covering more than … Read more
Turntable mixers are electronic devices that combine audio signals from multiple sources for control through a single deck. These decks typically contain multiple channels, each equipped with controls such as knobs or sliders, in order to permit nuanced effects over the entire sound mix. Components commonly occupy entertainment venues, with multiple sound inputs such as … Read more
A weatherproof phone is a type of phone that has been designed to withstand environmental elements. Generally, it is sturdier and more functional than the average phone. The most common type of weatherproof phone is the waterproof phone. Waterproof phones guard against water making its way into a phone device and compromising its function. They … Read more
A 3G handset is one of the more recent technologies in the cell phone industry. Finding a good phone that is capable of meeting your demands should not be too difficult. In some cases, it will come down to a matter of personal preference and finding a phone that will work on your cellular provider’s … Read more
An underwater digital camera is a digital camera which is designed to function underwater. It may take still or video photography or both, depending on the model. Such cameras tend to be more expensive than comparable models intended for dry land because they have to be carefully constructed in order to protect the integrity of … Read more
Rock speakers are speakers with a facade designed to look like rocks, but which actually deliver audio, usually in an outdoor setting. While the speakers may cost a little more than traditional audio speakers of a similar quality, they offer a great benefit for those trying to keep with a certain theme. Outdoor rock speakers … Read more
A Bluetooth earphone is a wireless earpiece that can be connected to a mobile phone, an mp3 player, a laptop or other Bluetooth-enabled device for hands-free use. Bluetooth earphones operate like headphones or headsets but without the constraints of a wire. Bluetooth earphones connect to devices using radio frequencies in the industrial, scientific and medical … Read more
Some digital camera accessories are things that everyone or nearly everyone needs. But beyond those, the best digital camera accessories for you are ones that work well with your particular camera and the types of use to which you put it. Probably at the top of the list for digital camera accessories is memory cards … Read more
To choose the best walkie talkie set to suit your needs, you must take a few things into consideration. What you plan on using the walkie talkie set for and what features you would like it to have are important. The range and distance the walkie talkie set provides will differ with various models, so … Read more
Comparing office answering machines and choosing the right one can prove a challenge, as there is much to consider. For instance, you can compare machines based on the number of messages they can record as well as the length allowed for recordings. You may also compare them based on whether you can operate them remotely … Read more