1. Multifunction: The transmitter and receiver can be paired arbitrarily, with 38 songs to choose from and 4 volume levels. 2. Wide Range of Use: This pager is suitable for patients, the elderly, pregnant women, and children to call for help, eliminating the need to shout to attract attention. 3. Long Wireless Range: With a 433MHZ wireless frequency, the receiver can receive signals up to 330m in open space and 50m through walls, regardless of horizontal or vertical distance. 4. IP55 Waterproof: The transmitter's call button is IP55 waterproof, suitable for restaurants, restrooms, etc., and is not afraid of getting wet. 5. Compact and Portable: The call button is lightweight and easy to carry, fitting in a pocket, hanging around the neck with a strap, or being installed by the bedside. Item Type: Caregiver Pager Material: ABS Wireless Receiving Distance: Approx. 330m/1082.7ft (Open Space) Wireless Frequency: 433MHZ Method: One to One Remote Control Built-in Battery: 1 x 23A Alkaline Battery 60mAh Voltage: 100-240V 1 x Receiver 1 x Call Button 1 x Manual