... 136 - 174MHz / 400 - 480MHz / 450 - 520MHz AT-3308 long range walkie talkies Features: 1) Working frequency: 136 - 174MHz / 400 - 480MHz / 450 ... Programming key to set, personalized function8) 500mW audio output9) With 1,500mAh Ni-MH battery, 14h for talking duration10) Compatible ... with American Military Standard MIL-STD810C, D, E tests, ...