Model Number : GS-WSD04Smart home platform : NONECertification : CE2pcs Wireless Fire Protection Smoke Detector Portable Alarm Sensor for 433MHz WIFI GSM Office Home Security Fire Alarm SystemIntroduction:Cordless smoke sensor alarm with built-in buzzer, general purpose ideal for all areas: house, shop, warehouse, factory, hotel, restaurant, office building, school, bank, library, computer house and storehouse etc. Alert and warn people stay far away from danger field when it detects smoke.The detector adopts the special structure design, has the dustproof, mothproof and anti outside light interference feature etc.Easy to install and operate.\Feature:- Ceiling or wall mounting-MCU Technology-Apply optical smoke test room-Insect-resistant design-LED light display-Using ABS materialSpecification:1. Power: 6F22 DC9V battery2 .Static current: ≤10uA3. Alarm current: ≤15mA4. Working temperature: -10°C~+50°C5. Humidity: ≤95%RH6. Alarm mode: sound & flash7. Wireless frequency: 433MHz8. Size: Φ106*H35mmPackage Content:2pcs Wireless Smoke Sensor (Bracket,screws included, battery not included)Note:This smoke detector can work alone or works with most alarm system in the market. Check if your burglar alarm system support: 433mhz/1527. We're not responsible for any compatiable problems between it and alarm systems you bought from other suppliers without a prior inquiry to us.It is compatible with 433mhz alarm systems as below: