Yosoo Portable Indicator Natural Gas Leak Methane Propane Butane Safe Alarm Sensor Detector Tester

Specifications: Material: Plastic Color: White (As the picture showed) Length: Approx. 22cm / 8.65inch Top Diameter: Approx. 1.5cm / 0.6inch Bottom Diameter: Approx. 2cm / 0.78inch Detection: Gas, LPG etc. Sensor: Planar Semiconductor Warm-up Time: ? 60 seconds Range of Detection: CH4:0 - 100% LEL Alarm Frequency: 2.713kHz / 30ms 2.713kHz / 100ms Range of Alarm: 2% LEL (LED Yellow) -10% LEL (LED Red) Alarm Time: within 20 seconds Alarm Mode: LED, Buzzer Working Temperature: 0?-40? Working Humidity: Less than 90% RH Power Source: 2 x 1.5V AA R6P (not included) Package Included: 1 x Gas Leak Indicator ( battery not included) Please see picture 7 as operation mannual Note: 1. Due to different producing batches, product details might be a little different. If you minding the difference, please buy it carefully. 2. Please allow some error due to manual measurement. Thanks for your understanding. 3. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.