Then, you need to be able to identify which journals are peer-reviewed. There are generally four methods for doing this: 1  Limiting a database search to peer-reviewed journals only. 2  Some databases allow you to limit searches for articles to peer reviewed journals only.
A walkie-talkie (more formally known as a handheld transceiver, or HT) is a hand-held, portable, two-way radio transceiver. Its development during the Second World War has been variously credited to Donald L. Hings, radio engineer Alfred J. Gross, and engineering teams at Motorola.
Walkie talkie range, or the maximum distance of communication, varies with the amount of power the transceivers produce. A 0.5-watt system might require users to be within 100 yards (91.4 m) of each other, while a 5-watt system might extend that distance up to 10 miles (16 km). The maximum communication range is generally determined under perfect conditions, meaning that there are no forms of obstruction between the two walkie talkies.