Guardian Telecom HDE11/11A Recessed Heavy Duty Emergency Speakerphone Features: Urgent situation Force Option push once instantly jewelry specific number(s) to call help Recessed Set up - Single Urgent situation Call Option Configuration ADA (American Incapacity Act) certified brand (HELP) Control Relays primary communicate standard on all models Resilient box with dust protected complete is corrosion resistant Distant selection allows you to deal with your emergency network from a central location LED provides visible verification connection has been made Presenter instantly operation Highest possible Presenter Amount at 0.5 m when Line Powered: 82 dB Available Audio Energy Firm Options: HDE-11 (P6977): 0.25 W (provides 85 dB Highest possible Presenter Amount at 0.5 m with Exterior Power) HDE-11A (P6984): 5.0 W (provides 92 dB Highest possible Presenter Amount at 0.5 m with Exterior Energy and Two Additional Relays) Recommended Applications: Universities Elevators Car auto parking Facilities ATMs Transportation Authorities Medical Centers Professional Parks Public Access Areas Building Entrances Flower Admittance Gates Wearing Facilities Entertainment Parks Mature Person Housing