Main Feature: 22 channel PMR system, LCD backlit display, battery status indicator, good sound quality. Long Sound Range: Generous range up to 3km(1.9mi), MAX rang can up to 5km(3.1mi) in the open field. Crisp and smooth sound quality with adjustable volume level, auto squelch function will mute the background noise so you get the crisp sound even in crowded places. This walkie talkies is great for supermarkets, shopping centres, festivals and other outdoor activities. Floureon will provide 1 year warranty and friendly customer service.