Two way handhelds

A Two way radio is an equipment used to receive and transfer while communication is between two parties or more than two. Two way radios can also be called ham radios, hand-held radios and walkie-talkies.
To operate the equipment we must have more than one so one caller can transit and the listener can receive. We push a button which is called the PTT button. By pressing the PTT button we can transmit audio to the other party. The other person can do the same while you release your PTT button after transmitting.
Many people throughout the world use these equipments because they are totally free of charge and can be used in locations where there isn't any phone network.

VHF versus UHF

There are two major formats for two-way radios. They are Ultra High Frequency (UHF) radio and Very High Frequency (VHF) radio. Neither frequency band is inherently better than the other. Both formats are effective ways to communicate with another person so the right radio depends on the application.

The wavelength of a UHF and VHF signal plays a big role in which radio technology to use. UHF has a shorter wavelength which makes it easier for the signal to find its way through rugged terrain or the inside of a building. The longer wavelength of VHF means it can transmit further under ideal conditions. For most applications, lower radio frequencies are better for longer range. A broadcasting TV station illustrates this. A typical VHF station operates at about 100,000 watts and has a coverage radius range of about 60 miles. A UHF station with a 60-mile coverage radius requires transmitting at 3,000,000 watts.