1.铝合金压铸外壳,机械强度高,抗冲击能力强。2.GSM / 3 g电话. .3.重型听筒与助听器兼容。4.耐候性防护为IP66-IP67。5.不锈钢衬垫。 6.Auto-dial when handset picked up and the emergency phone number can be set as requested. 7.Wall mounted, Simple installation. 8.Multiple housings and colors. 11. Self-made telephone spare part available. 12. CE, FCC, RoHS, ISO9001 compliant