Tuya Smart App Control: Scan the QR code or search for "Tuya Smart" to download App, you can add or remove buttons in the App; remove Alerts in the App; Implement multi person sharing function in the app About This Item: How This Tuya Wi-Fi Emergency Call Button Work: Connect the emergency button to your WiFi and add it to the Tuya smartphone app. When the elderly/patient/person with limited mobility needs help, they just need to press the call button. No matter where you are, your phone can receive an alarm message, and you can go to help your family in the first time Small Size and Portable Call Button: lanyard are included in the package; Can be hung on the neck with a lanyard or pasted with Double-sided tape, small size call button anyone can operate it Mutiple People Sharing: Share with more family members through the sharing function in Tuya App. After pressing the button, the person you shared can also receive alarm messages, so that multiple family members can participate, Weight: 0.13337966851 Pounds, Manufacturer: NONDK