How this Tuya WiFi Emergency Call Button Works: Connect the emergency button to your WiFi network and add it to the Tuya smartphone app. When the elderly/patient/person with reduced mobility needs help, they just need to press the call button. No matter where you are, your phone can receive an alarm notification, and you can go to help your family first. Small Size and Portable Call Button: The lanyard is included in the package; it can be hung around the neck with a lanyard or pasted on the wall with double-sided tape. The call button is small in size, anyone can use it. Tuya Smart APP Control: Scan the QR code or search for "Tuya Smart" to download the app, you can add or remove buttons in the app; clear notifications in the app; implement the multi-person sharing function in the app. Multi-Person Sharing: Share with more family members through the sharing function in the Tuya app. After pressing the button, the person you shared with can also receive alarm notifications, allowing multiple family members to participate. Description: Tuya WiFi Smart SOS Call Button Wireless Pager Pager Phone Alarm Transmitter Emergency Call Button for Disabled Elderly Patients (Supports 2.4GHz Wi-Fi Only) Material: Plastic Color: White + Red Package Contents: 1 x Call Button (Random Lanyard, Cannot Choose Specific Lanyard) 1 x USB Cable Package contents only, other products are not included. Note: Light reflection and different displays may cause the color of the item to vary slightly from the real thing. The allowed measurement error is +/- 1-3 cm.