This product is one of the most important things you can do to protect your Family and your Home or Business by installing up to 18 of these detector alarms throughout your home or Business.These detector alarms have "voice warning with location" technology which means that integrated alarms tell you where the smoke or carbon monoxide is in your home with an actual voice. For example, if there is fire in your basement, the alarm in your bedroom will speak 'Warning, Evacuate, Smoke in Basement. The alarms communicate with each other wirelessly through integrated radio frequency. When one sounds, they all sound, providing a whole-home safety network!and giving early warning with location which allows the occupants time to exit safely avoiding the direction where the smoke or carbon monoxide is reported to be."If you want the benefits of an integrated smoke and carbon monoxide alarm system, without the cost and hassle of retrofit wiring in your home, consider this integrated wireless smoke and carbon monoxide alarm system with voice warning and location technology for your home or business.