**********All the walkie talkies have been set well could use directly out of box*****Walkie talkies with earpiece and mic set keep your smoothly receiving and transmittion; Ideal for church; werehouse; hotel; hunting and various activities*****Reinforced and compact radios body; antenna; belt clip are drop-resistant; dust-resistant; and water-resistant; which can work well in harsh environments*****Long distance walkie-talkie keep your clear conversation in the buldings or the outside; built-in safe call can enhance your call safety and block strange call*****Multi features Two Way Radios with good signal; Emergency alarm will protect your safety when you work alone; Scanning allows you to locate conversations in progress