Portable Gas Leak Detector Propane Butane Methane Natural Gas Safe Alarm Sensor Portable Natural Gas Leak LPG Methane/Propane/Butane Indicator Sensor Detector. Package Contents: 1x Natural Gas Detector 1x Lanyard 1x English Manual Technical Specifications: Model: B05 Color: White Material: Plastic Detection: Natural gas(NG), methane. Sensor: Catalytic method gas senor Warm up time: within 200 seconds Range of detection:0 ~ 9999 ppm Resolution: 100 ppm Alarm LED: Three colors 2.713kHz / 100ms Range of alarm: ~2% LEL (LED Yellow) ~10% LEL (LED Red) Alarm mode: LED Working temperature: -20C ~ 70C Working humidity: Less than 90% RH Power source required: AA 1.5V * 2 (Not included) Dimension: 190*24.5MM/7.5*1" Features and Benefits: ● Portable Natural Gas LPG Methane/Propane/Butane Indicator ● Auto power off ● Visible LED three colors alarm and Range of detection:0 ~ 9999 ppm ● 2 x 1.5V Battery (not included) ● Highly sensitive, noise signal proof Notice: 1. Please allow 1-3mm error due to manual measurement.Pls make sure you do not mind before you bid. 2. The color may have different as the difference display,pls understand.