• Protocol : Zigbee 3.0 (requires Zigbee Gateway)
• Detection : Photoelectric, smoke alarm & low battery
• Power supply : CR123A battery (autonomy ~5 years)
• Dimensions : Ø60mm x 36mm (weight 82g)
• Installation : Adhesive or screw (ceiling/wall)
• Scope : Standard Zigbee (~80m free field)
• Temperature : -10°C to +55°C (humidity 0-95% HR)
• Functions : Self-test, adjustable sensitivity (low/medium/high), volume 80dB

I have removed the links to the merchants, this product is almost nowhere to be found.
It does not comply with EN 14604.