The WISUALARM DHI-HY-GC20D-R8 is a wireless interconnected carbon monoxide (CO) detector for indoor use. It features:

• Electrochemical CO sensor
• Sealed 3V CR123A lithium battery with a 10-year lifespan
• Audible and visual alarms (>85 dB(A) at a distance of 3 meters)
• Silence function (~45 seconds)
• Fault and low-battery alerts
• Wireless interconnection with up to 24 units (868 MHz, up to 1000 m in open space)

Made from PC+ABS, it is wall-mounted and measures 116.4 × 71.7 × 29.1 mm, weighing 125 g. It is TÜV and CE certified and complies with EN 50291-1:2018. A CO safety device for indoor residential use.