CLARITY:VANDAL-RESISTANT DOOR ENTRY SPEAKER
 Used with DL-24A school/industrial intercom system. Provides call button and talkback speaker.  Features:
  - Heavy duty steel pushbutton  
- Internal louvered speaker grille  
- 45 ohm speaker  
- Faceplate constructed from 11AWG steel  
- Mounts in a 2-gang 4" x 4" electrical box