Product details:

Wireless smoke alarms with photoelectric sensors. Voice location technology. Test/silence button, 85 decibel horn, lights, and low battery warning. Includes AA batteries. These alarms are interconnected so when one goes off, they all go off and with an 85-decibel siren and a voice that tells you where the danger is located. Each alarm features 11 pre-programmed choices and the best in photoelectric smoke sensing technology to reduce the number of nuisance alarms from cooking or shower steam. Type: Battery. Photoelectric alarm type: Smoke. Use: Residential.