Putogesafe Smoke Detector Interconnected, Wireless Smoke Alarm with 5 Years Replaceable Battery, 10-Year Lifetime Fire Alarm with Silence Function and Low Battery Warning for Bedroom and Home,6 PacksBrand: Putogesafe Color: white Features: 10 YEARS PRODUCT LIFETIME: This fire alarm comes with 5 Years replaceable battery. 10 year product lifetime to keep your family safe. Besides, this smoke detector has a low battery warning which will promptly remind you to replace smoke detectors. WIRELESS INTERCONNECTED: This smoke alarm can realize the interconnection between same models. When fire detector detects smoke and the alarm sounds, other alarms