The Ajax Systems Protect 2 siren detects carbon monoxide and alerts with sound and light. It operates as part of the Ajax security system or independently, without a Hub. The built-in battery lasts up to 10 years; after that, the entire device must be replaced.

• Type: Siren and carbon monoxide detector
• Operation: Standalone or via an Ajax system
• Connection type: Wireless
• Use: Indoor
• Alert type: Sound and light
• Siren volume: 85 dB at a distance of 3 m
• Transmitter power: 20 mW
• Distance from control panel: Up to 1,700 m in an open area
• Communication protocol: Jeweller (868.0–868.6 MHz)
• Tamper alarm: Yes
• CO detection: Above 50 ppm (0.005%) within 90 minutes, above 100 ppm (0.01%) within 40 minutes, and above 300 ppm (0.03%) within 3 minutes
• Fire safety standard: EN 50291-1:2018
• Authentication protection: Protection against device authentication spoofing
• Compatibility: Hub Plus, Hub 2 (2G), Hub 2 (4G), Hub 2 Plus, Hub Hybrid (2G), Hub Hybrid (4G), ReX, ReX 2, and Ajax peripherals
• Battery: Built-in, non-replaceable, with a lifespan of up to 10 years
• Operating temperature: From 0 °C to +50 °C
• Operating humidity: Up to 80%
• Dimensions: 43.5 × 86 × 86 mm
• Weight: 143 g
• Color: Black