Feature:1. Multi Function: The transmitter and receiver can be paired arbitrarily, there are 38 songs to choose from, 4 gear volume adjustment.2. Wide Purpose: This pager is suitable for patients, the elderly, pregnant women, children to call for help, no need to shout to attract attention.3. Long Wireless Distance: Using 433MHZ wireless frequency, the receiver can receive signals as far as 330m in open space, 50m through wall, regardless of horizontal or vertical distance.4. IP55 Waterproof: The transmitter call button is IP55 waterproof, suitable for restaurants, toilets, etc., not afraid of getting wet.5. Compact and Portable: The 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: Caregiver PagerMaterial: ABSWireless Reception Distance: Approx. 330m/1082.7ft (Open Space)Wireless Frequency: 433MHZMethod: One to OneRemote Control Built in Battery: 1 x 23A Alkaline Battery 60mAh.Package List:1 x Receiver1 x Call Button1 x Manual