The working principle of this Tuya Wi-Fi emergency call button: connect the emergency button to the home Wi-Fi network and add it to the Tuya smartphone application. When an elderly person, patient, or individual with limited mobility needs assistance, they can press the call button. Regardless of location, the designated users will receive alert notifications on their smartphones, enabling prompt support. Compact and portable call button: The package includes double-sided tape and cable ties. The device can be worn around the neck using a lanyard or mounted on a wall with the included tape. The small-sized button is easy to operate for all users. Tuya Smart Application: Scan the QR code or search for "Tuya Smart" to download the application. Users can add or remove the button within the app, clear alarms, and enable multi-user sharing functionality. Multi-user sharing: Share device access with multiple family members through the Tuya app. When the button is pressed, all shared users will receive the alert, allowing several family members to respond. Suitable for various locations: ideal for use in homes, nursing facilities, hospitals, clinics, and more. Note: For optimal signal reception, ensure the device is within range of the Wi-Fi signal. Material: Plastic Color: As shown in picture Package Contents: 1 x SOS button Only the items listed above are included; other accessories are not included. Note: Due to lighting effects and differences in display screens, the color of the item may vary slightly from the images shown. Measurement error allowance is +/- 1-3 cm.