Feature: 1. Dual Sensor: Equipped with dual sensors, this gas detector could intelligently detect multiple gases, with high sensitivity, features a self check function, increasing reliability. 2. Sound and Light Alarm: When CO exceeds the limit or gas leakage is detected, this alarm detector will emit an alarm sound and flashes red indicator light for immediate alert. 3. Fireproof ABS Housing: The gas detector adopts fireproof ABS engineering plastic casing, ensuring long term safety and durability. 4. Wiring Free Installation: Designed for hassle free installation, this detector can be installed independently without the need for complicated wiring. Simply install a 9V battery(not included) or plug it into a power source to use. 5. Versatile Gas Detection: This detector alarm is suitable for detecting various gases, including CO, natural gas, coal gas. Specification: Item Type: Natural Gas Detector Material: ABS Battery: 9V 6F22 x 1 (without battery) Plug Voltage: AC90-240V Basic Parameters: Concentration Range: 3000PPM (±1500PPM). Package List: 1 x Natural Gas Detector2 x Anchor2 x Screw1 x User Manual