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 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 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 Tuya WiFi Smart SOS Call Button Wireless Caregiver Pager Phone Alert Transmitter Emergency Call Button for Elderly Patient (Only Supports 2.4GHz Wi-Fi) Material: plastic colour: White+Red Package Contents: 1 x Call Button(random lanyard, Cannot be chosen the specific lanyard) 1 x usb cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.