特殊连接廉价囚犯监狱电话服务无按钮监狱电话JWAT123型号:JWAT123防护等级:IP54材料:304不锈钢尺寸:118 × 116 × 59.5通信方式:模拟产品说明标准模拟电话。电话线接通了。2.304不锈钢材质外壳,机械强度高,抗冲击性强。3.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。4.自动拨号。5.带簧片开关的磁钩开关。6.Optional noise-canceling microphone available 7.Wall mounted, Simple installation. 8.Weather proof protection IP54. 9.Connection: RJ11 screw terminal pair cable. 10.Multiple color available. 11.Self-made telephone spare part available. 12.12. CE, FCC, RoHS, ISO9001 compliant.