SX-1型手持送话器是上海电讯器材厂1964年的新产品之一,经过有关部门鉴定,证明性能良好,符合使用要求.SX-1型手持送话器又称手持话筒,用于轻型无线电台成套设备中,可供航空、海运、地质勘探、登山、无线电运动等部门作无线电通话用.根据不同使用要求,手持送话器的话机绳规格分为:1.5米四芯、3米三芯和5米四芯三种. SX-1 handset is one of the new products of Shanghai Telecommunication Equipment Factory in 1964. It has been verified by relevant departments that it has good performance and meets the requirements of use. The SX-1 handset is also called handset microphone, Radio sets of equipment for aviation, maritime, geological exploration, mountaineering, radio movement and other departments for radio calls.According to different requirements, handset phone cord specifications are divided into: 1.5 m four-core, three meters three Core and 5 m four-core three.