1、FULL DUPLEX COMMUNICATION MODE: Real time voice intercom, confidential calls, anti interference; 1 click call; Answer calls with 1 click; 1 click hanging up or automatic hanging up, automatically hanging up after 1 minute of conversation.2、INCOMING CALL FLASHING LIGHT AND RINGING PROMPT: Prompt time is 20 seconds; Automatic answering of incoming calls; The sound of the incoming bell is 108 decibels, which is larger than the ringtone of a mobile phone.3、EASY TO USE: Insert 5V1A power adapter into the internal unit, never power off. This internal unit is an ideal supplement for the exiting intercom system.4、CALL DISTANCE: The internal unit and internal unit can call and talk to each other; The measured call distance is 100 meters. Floors 1 to 4.5、BIDIRECTIONAL DIALOGUE: Nurse pagers are suitable for caregivers and patients, elderly, residents, disabled, and patients. Seek help at home. No need to shout to attract others attention.