Peasway PW-507 Low Battery Warning Smoke Detector

Peasway PW-507 Low Battery Warning Smoke Detector, Material ABS Plastic, Smoke Sensitivity 0.086 dB/m to 0.140 dB/m, Tamper Resist locking Pin,  Alarm Decibel Louder than 85dB at 10Feet, Environment Temperature 10°C ~ +50°C,  Power supply 9V Carbon Zinc Battery/PP3(Battery Included), Environment Humidity 10% to 95%(40±2°C) .