Service Guarantee:Amazon Logistics is our partner, we can deliver the package to your home within 1-2 days, we provide 30 days return service, our product manual has detailed operation instructions and operation video to help you better use our products. If you have any questions, you can contact us through Amazon's email, and we will definitely provide after-sales service to your satisfaction.<br>Share Function & Expandable: You can set the sharing function of the tuya app so that when your loved one presses the panic button, everyone you share it with can receive the alert message; besides this WIFI call system is expandable, you can add more hubs, or call buttons to meet the needs of various different usage scenarios.<br>How this WIFI APP Caregiver Pager Works: When the elderly/disabled/kids press the call button, the hub will sound an alarm, at the same time, the smartphone APP will receive a warning alert, no matter the phone is in another city or province, you can receive a instant warning alert anywhere, and it will also record every calling record.<br>Easy for the Elderly or Those Who Need Help to Use: The SOS Panic Button Alarm is a good present for anyone who has elderly or someone needs help, so they have a piece of mind knowing that when their parents are home alone they can still be safe ,or easily notify you if they need help like if they fall or get hurt.It easily works off your smartphone, so in case of emergency it can sends help right away with a push of the call button with finger.<br>Keep You Peace of Mind & Give You More Freedom: This WIFI caregiver pager can be used as a simple indoor wireless caregiver call button system, but also as a remote call system that can span different cities, states, and even countries.