ZDD-309SH Smoke and Heat Detector Features:

1. Dual Detection Technology:
   • Incorporates both photoelectric smoke sensor and heat sensor for comprehensive fire detection.
2. Long Battery Life:
   • Powered by a 3V lithium battery with a lifespan of up to 5 years.
3. Adjustable Sensitivity:
   • Allows users to adjust the sensitivity level (Low/Medium/High) based on environmental conditions.
4. Loud Alarm:
   • Emits a loud 85 dB alarm at 10 feet to alert occupants in case of smoke or heat detection.
5. Wide Operating Temperature Range:
   • Operates effectively in temperatures ranging from -10°C to 50°C (14°F to 122°F).
6. High Humidity Resistance:
   • Can withstand relative humidity levels of up to 95% without condensation.
7. Compact Design:
   • Compact and sleek design with dimensions of 115mm in diameter and 50mm in height.