TLSP-F Louroe Electronics Tamper Proof Two-Way Speaker/Microphone - Flush Mount
Models TLSP-F and TLSP-S are two-way talk/listen speaker/microphones mounted to an 11 gauge stainless steel faceplate. A special designed tone path protects both the speaker and microphone from vandalism. When interfaced with a Louroe Base Station, these units provide talk/listen using an electret condenser microphone and a 3” speaker, all in the same housing.
....Or any area where vandalism is a concern