Product material: plastic Dimensions: 9 x 9 x 3.5 cm Alarm volume: about 85dB Working temperature: -10+50 Working voltage: 3V color: Quantity: 1 piece Package content: 1 piece * Smoke detector 1. Theres nothing like protecting yourself and your loved ones at home. al fires kill thousands of people each year, and inhalation is one of the most common hazards causing serious casualties. Smoke Alarm 10 Extended Smoke alarm is the protection you need to keep your home safe. 2. The device alarm sounds at 85 decibels, which is loud enough to wake the gentlest of sleepers. Even if you come down from the hallway or any room, everyone knows the alarm has gone off and there is a risk of fire or . 3. Empty batteries are one of the main limiting factors in alarm performance, which is why our al contain a 10-year lithium-ion with an extended lifespan. With a lifespan of 10 years, you can be sure that this device will always be vigilant. A practical button allows weekly tests or the device to be muted in the event of a false alarm for food that has been burned in the kitchen. 4.The 10 Year Old Smoke Alarm with Extended of the Smoke Alarm Dont Worry: excellent performance alarm works 24 hours a day and has reliable advanced technology.