8-channel, ultra-high frequency firing Channel scan, call, monitoring functions Volume selection function, sound quality adjustment function Low battery warning device PTT call capability Output power 0.5W, are free to replace the top cover Application: Children' s play area of family communication family elders call a family of outdoor activities, travel by car cars The mapping of traffic forestry business areas industrial and mining logistics scheduling security entertainment hotel restaurant office automation prohky MY SKYPE : huangshhky