- Alternate action call button to place or cancel a call- Intelligent call progress detection for automatic hang-up on CPC silence busy signal or time out- Telephone line powered- Weather resistant features mylar speaker gaskets internally sealed push button switch UV stable exterior enamel coated PCB- Optional Enhanced Weather Protection EWP available for greater weather resistance- Adjustable microphone and speaker volume- Programmable maximum call length- Selectable auto-answer feature allows remote monitoring- Two way handsfree communication- Programmable VOX mic speaker switching speed- Light gray colored impact resistant U V stable plastic chassis- Surface mountable only
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