TATTLETALE HOME SECURITY ALARM SYSTEM, Wireless, "Cell-Burst" Technology, Portable, GSM SMS Email Cellular All-in-one, with built-in siren, strobe light, motion detector, LCD touch-screen. Two door/window sensors and remote control key fob included with each order. Installation of remote sensors takes only minutes by even non handy-men. Tattletale is the only alarm system to use patented and proprietary "Cell Burst" technology which sends a signal less than one second after an alarm activation. Tattletale does not require a land phone line, as all other security systems do. The optional 24/7 National Monitoring Service or SMS/Email Service will notify you and/or police. It is NOT required to sign up for either of these services. You can still use your Tattletale as a local alarm, as many people choose to do. The Tattletale Base Unit has both a high-decibel sonic alarm and a high-intensity strobe light, intended to scare away any would-be intruders. All Tattletale components and assembly are done in the United States. All components, including base unit and sensors are constructed of Military Grade, High-Impact plastics, making them virtually indestructible. The base unit is portable and weighs less that two pounds. Place it anywhere in your home or apartment. Usually, people keep it on their nightstand, so they can set it after going to bed. The small slot on the left side (see photo above) is for a camera chip which lets the unit double as a photo display for all of your family pictures. Your visitors and guests will not even know that it is an alarm system! Quality design and construction means NO FALSE ALARMS! Tattletale has been the leader in Commercial and Industrial security for over two devades. Now, Tattletale makes their legendary technology available to the home.