HY-GC21B-W2-868 is a wireless carbon monoxide detector designed for home security, featuring a high-precision electrochemical sensor for reliable detection. It includes an 85 dB audible alarm and an LCD display for immediate and clear notification. 868 MHz frequency communication with AES128 encryption ensures secure and stable transmissions. Powered by a CR123A battery with up to 3 years of battery life, it offers long-lasting performance without frequent maintenance. Certified to EN 50291 and TÜV standards, it ensures high safety standards. Compatible with the DMSS app for real-time notifications, it is ideal for indoor environments. Dahua