特点1。铝合金压铸外壳,机械强度高,抗冲击能力强。2.标准模拟电话。支持SIP/VoIP、GSM/3G版本。3.重型听筒与助听器兼容,降噪麦克风。4.耐候性防护为IP66-IP67。5. Waterproof stainless steel button 6. Wall mounted, Simple installation. 7. Phone line powered. 8. Connection: RJ11 screw terminal pair cable. 9. Sound level of ringing:over 80dB(A). 10. Multiple housings and colors. 11. Self-made telephone spare part available. 12. CE, FCC, RoHS, ISO9001 compliant