紧急对讲机KNZD-30-2IPIL

音频 对电梯 对银行

应急对讲机作为一家专业的应急对讲机工厂，我们提供不同种类的应急对讲机，地铁电话，户外应急电话，并出口到130个国家。亚洲最专业的应急对讲机制造商!我们是一家专业生产免手摇电话、智能音频数字门对讲机的厂家。KNZD-30应急对讲机是一家专业生产免手电智能音频数字门对讲机的厂家。紧急对讲机只能进行语音呼叫。voip对讲机支持视频通话。描述项目1。不锈钢304机身，防破坏、防篡改五金件，安装方便。防水等级IP55防尘。3.(可选)免提按钮，双扬声器。 5. Lightening protection to ITU-T recommendation K.21. 6. POE power supply or DC12V. 7. Temperature range from -40 degree to +70 degree. 8. Support echo cancellation. 9. Remote software upgrade, configuration and monitoring. 10. Optional 7 minute time out to release the line if the handset is left off hook. This function upon buyer’s requirement). 11. The housing covered with a layer of reflective label for easy identification at night.Optional 12. Application: Tunnel, metro, railway, LRT, speedway, marine, ship,offshore, mine, power plant, bridge etc.