Feature: 1. FAST DETECTION: Mini gas detector is used for fast and reliable detection of flammable gas leaks, provide great convenience for your home 2. GAS SENSING SEMICONDUCTORS: Combustible gas detector possess good sensitivity, excellent repeatability, and long service life 3. NON SLIP ABS: The shell is made of good quality ABS engineering plastic material, composite non slip, possess impact resistance 4. WIDE APPLICATION: Widely used in metallurgy, petroleum, chemical, coking, municipal, biochemical medicine, agriculture and other industries 5. FLEXIBLE DETECTION: Long probe for easy access into difficult to reach areas, one hand operation makes gas leak detection quick and easy in your home, RV, or other workplace Specification: Item Type: Mini Gas Detector Model: HT66 Material: ABS Battery: 2 x 1.5V AAA (not included) Uses: Can be widely used in metallurgy, petroleum, chemical, coking, municipal, biochemical medicine, agriculture and other industries Basic Parameters: Sensor: Gas sensing semiconductor Response Range: About 50PPM~1000PPM (methane) Sensitivity: About <50ppm (methane) Warm Up Time: About 30 seconds Response Time: <=500PPM: About 5 seconds >500PPM: About 2 seconds Alarm Mode: Buzzer and indicator light . Package List: 1 x Mini Gas Detector1 x User Manual