The Additional 911 Emergency Handset from Just In Case is a 1-button device that will directly connect the user to an emergency response operator when pushed. It is an accessory to the 911 Emergency Phone Base and Handset and requires the base from this system in order to work. Each base is capable of syncing with up to 5 handsets should more than 1 Additional 911 Handset want to be setup. When linked with the base unit it will provide immediate help in the event of a fall, accident, fire, home break-in or medical emergency by simply pushing the “911” button. This handset is waterproof and can be Velcro mounted to various spots around the home to ensure that no matter where you or a loved one go one is nearby. This makes it extremely handy for seniors as well as those who just simply live alone and wouldn’t be able to yell for help in the event of an emergency. The handset is powered by 2 AAA batteries which are included with the purchase.