"Liztek Portable Wireless Doorbell kit
Gone are the old days when a knock at the door would be enough to alert homeowners about the presence of a visitor. The Liztek wireless doorbell comes in to save the day. This device is a convenient doorbell choice. With a range of up to 1000 feet, you are assured not to miss a single visitor. It's hassle-free as you just need to plug it into a power outlet and it begins to function."