Made of high quality material, solid, durable, high sensitivity and good performance. Specially designed gas detector to ensure the safety of you and your family. Compact detector and easy to install Combustible Gas Detector with 85dB alarm. 12V model with non-polarized (reversible) power connectors for easy wiring. Can detect propane, butane, liquefied petroleum gas and natural gas, city, coal, common combustible gases. Suitable for recreational boats, vehicles, RVs, campers, yachts, etc. Material: ABS, electronic components Size: approx. 1.89 inch Color: White Quantity: 1pc Silent current: 90mA Alarm current: ≤100mA Rated power: 0.01W (12V DC power supply) Alarm concentration: 10% LEL Alarm sound pressure: 85dB/M < p>Installation method: Wall mounted Package includes: 1 x Gas Detector Note: This does not include other color-based items in the package. the first picture and other pictures are just showing the effect Due to the differences between different monitors, the picture