Suit for all alarm system in our store
A Smoke detectors are typically housed in a disk-shaped plastic enclosure about 150 millimetres (6 in) in diameter and 25 millimetres (1 in) thick, but the shape can vary by manufacturer or product line. Most smoke detectors work either by optical detection (photoelectric) or by physical process (ionization), while others use both detection methods to increase sensitivity to smoke. Sensitive alarms can be used to detect, and thus deter, smoking in areas where it is banned such as toilets and schools. Smoke detectors in large commercial, industrial, and residential buildings are usually powered by a central fire alarm system, which is powered by the building power with a battery backup. However, in many single family detached and smaller multiple family housings, a smoke alarm is often powered only by a single disposable battery.
* 9V DC bettery operated （not included）
* Flash alarm indicator (red)
* 85 db alarm singal within 3 m
* Solid connections
* Low battery signal
* Test button
* Size: (diameter) 101*34mm
* Frequency: 315/433 Mhz
smoke detector is a device that detects smoke, typically as an indicator of fire. Commercial, industrial, and mass residential devices issue a signal to a fire alarm system, while household detectors, known as smoke alarms, generally issue a local audible and/or visual alarm from the detector itself.
1 X Smoke detector(no battery)
New Arrival HD WIFI IP camera
Payment: * Payment must be made within 3 days when order placed. * If you have a problem with payment,please contact with us or the customer service of Aliexpress. Shipping: *We will ship package in 2-3 business days after payment clear. *We can’t control service transit time, this information is provided by the carrier and excludes weekends and holidays. So please give us an opportunity to check package for you. *SERVICE TRANSIT TIME is provided by the carrier and excludes weekends and holidays.Transit times may vary, especially during the holiday season. *If you have not received your shipment within 60 days from payment, please contact with us. We will track the shipment and give a reply to you as soon as possible. Our goal is customer satisfaction! Warranty: *1 Years replacement warranty. *We benefit for all item sale.If you need help and have any other question, please feel free to contact us by Aliexpress message. *Buyer is responsible for return shipping costs and insurance. *Shipping/Handling/Insurance costs are not refundable. Feedback: *Your Positive feedback and all 5 stars are important to us which encourage us to do better and support best service and good product for all clients.Thanks in advance for you leaving positive feedback and 5 stars. *Please don’t leave negative feedback and low score, because that won’t solve problems. Please give us an opportunity to service you again. Contact us: *Hours of Operation – We are open Monday through Saturday 9:00am – 6:00pm. If you mail us a question after business hours, we will do our best to answer your question. If not, we will get back to you on the following business day. Thanks for your visit and welcome to visit us again!