Feature 1TRANSMITTER AND RECEIVER: The transmitter and receiver can be paired arbitrarily, there are 38 songs to choose from, 4 gear volume adjustment. 2LONG WIRELESS DISTANCE: Wireless caregiver pager is using 433MHZ wireless frequency, the receiver can receive signals as far as 330m in open space. 3EASY TO USE: Elderly monitoring call button is plug and play, easy to use by plugging the receiver into an electrical outlet, very convenient to use. 4WIDE USE: Caregiver pager is suitable for patients, the elderly, pregnant women, children to call for help, 50m/164.0ft through wall, regardless of horizontal or vertical distance. 5COMPACT DESIGN: call button is easy to carry and can be carried in pocket or hung around the neck with a sling, or can be installed by the bed.Specification: Item Type: Wireless Caregiver Pager Material : ABSWireless Reception Distance: 330m/1082.7ft (Open Area)Wireless Frequency: 433MHZMode: Two for OneBuilt in Li Polymer Battery: 2x1000mAh (Receiver), 1x23A 60mAh Battery (Transmitter) ---------- .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:2xHost1xButton1xInstruction Manual2xCharging Cable