This is a home call bell, care call bell, buzzer call, and care call bell. In an emergency, pressing the portable call button will sound the care buzzer and your smartphone. I purchased this for my mother's care, but she was able to move into a facility, so it has been stored at home unused. I am listing it in the hope that someone who needs it will use it. The WiFi smart call bell supports connection with smartphones, allowing you to remotely receive signals from the emergency call button on your smartphone. This allows you to go out with peace of mind, even for a short shopping trip. The emergency button is large and easy to press, making it convenient for people at home who need help, such as the sick, elderly, or children. The WiFi emergency button can also be put in a pocket, hung around the neck, or mounted on a wall. For details, an instruction manual is included. Please understand that this is a used item stored at home. I have tested the operation for this listing, and there were no problems. Set contents: Instruction manual Transmitter Receiver Strap Reset pin Type B power cord Cushion tape Velcro tape Thank you very much.