Feature 138 Songs Available: Our call button has 38 songs can be applied, so you can select the right music to use according to the actual situation. 24 Volume Adjustment: This elderly call button also has 4 regulable volume levels, so you can hear the call button no matter where you are. 3Louder Sound: 330m reception in open space, 50m through the wall, louder. Let the demanded voice get to the needed place. 4Any Pairing: The transmitter and receiver can be paired at will. Light weight, very convenient and practical, and does not take up much space when stored. 5Applicable Scenes: Our elderly call button can be applied to elderly pager, greeter, hospital patient one touch call and other scenes.Specification: Item Type: Elderly Monitoring Call Button Material : ABSWireless Receiving Distance: 330m (open area)Wireless Frequency: 433MHZMode: 2 in 1Remote Control Internal Battery: 2x23A alkaline batteries, 60mAhVoltage: 100-240V ---------- .wang-edit-text{ ------------ font-family:'Arial' !important; ---------- } ---------- .wang-edit-text table { ------------ border-top: 1px solid #000; ------------ border-left: 1px solid #000; ---------- } ---------- .wang-edit-text table td, ---------- .wang-edit-text table th { ------------ border-bottom: 1px solid #000; ------------ border-right: 1px solid #000; ------------ padding: 3px 5px; ---------- } ---------- .wang-edit-text table th { ------------ text-align: center; -------- }Package List:1xElderlyMonitoringCallButton2xRemote Control1xUser Manual