GSM OR CDMA wireless emergency telephone Introduction: GSM900Mhz/DCS1800MHz/PCS1900Mhz network ,It has higher receive sensitivity and better interference resistance ability ,It can supply customer with credible speech service and other multiplication service in the area of effective network bestrow. And solve the communication problem effectively where cable telephone can't reach in. The telephone is suitable in metro, speedway, ship, mine, power plant ,parking lot, steel plant, big engineer and etc ,which used in the serious environment with special requirement of waterproof, dustproof ,explosive proof ,anti-jamming and so on. Main features of product: 1、 Cabinet：aluminum alloy die－casting，high anti-violent, able to glisten, convenient for looking for ( optional). 2、 Door cover：orient automatically and good self－closing，convenient for use. 3、 Handset：made of special engineering plastic，high anti-knock resistance、high tensile strength resistance and high anti-violent. 4、 Phone is provided with high stability，high anti-jamming capability，and it is up to national standard GB/T 15279-94.