... Quad-band frequency IP57 waterproof,Walkie Talkie Digital compass,barometer,barometric altimeter Rugged Mobile Walkie TalkieOutfone BD351 Waterproof Mobile ... altimeter and thermometerSupport multi-languagesThe 1st Mobile Phone with Walkie Talkie Function! Welcome inquiry! 1)General Network:GSM850/900/ ... 134g4)SIM: single SIM single standby 5)Support walkie talkie(about 3-5km at open place)6)Screen: 2 ...