Features 1、Waterproof Design: Wireless call button is slim and waterproof, so it can be used outdoors without worrying about getting wet by coffee or tea. 2、Prevention of Loss: Caregiver pager call button can be equipped with a cord to be used as a pager for the elderly, so that it is unlikely to be lost. 3、Remote Reception: Restaurant calling pager button can be used in open spaces of 330m/1082.7ft, 50m/164ft through wall and floors 1‑3. 4、Wide Scope of Application: Wireless care giver pager call button is widely used in doorbells, pagers for the elderly, panic button, etc. 5、Exquisite Appearance: Waterproof nurse alert call button is beautifully made and comfortable to the touch, using classic black. Specification Item Type: Wireless Call Buttons Material: ABS Wireless Reception Distance: Approx. 330m / 1082.7ft (open area) Wireless Frequency: 433MHz Built in Battery Specifications: 23A alkaline battery 60mAh x 1 Package List 1 x Wireless Call Button