RED ALERT WiFi VoIP Surface-mount Emerg. Tel., Single Button, Alum. Encl.; Number of Handsets 0 - Number of Lines 1 - Electronic Ringer - Speakerphone Yes - Mount (Type) Surface Mount - Voicemail No - Call Waiting No - Caller ID No - Requires WiFi/Setup - Cord Type Armored Cord - Features Help Button - Network Protocol VoIP