特点1。坚固的外壳,由冷轧钢与粉末涂层建造。2.防破坏手机与内部钢挂绳和环提供了额外的安全性的手机线。3.带簧片开关的磁钩开关。4.扩音器与电话相连,当有来电时,扩音器会响起,1-7声后,来电会自动通过扩音器接通。摘机后,通话将通过听筒进行。5.Optional noise-canceling microphone available. 6.Wall mounted, Simple installation. 7.Weather proof protection IP65. 8.Connection: RJ11 screw terminal pair cable. 9.Multiple color available. 10.Self-made telephone spare part available. 11.CE, FCC, RoHS, ISO9001 compliant.