1. [High Sensitivity] Equipped with a highly sensitive sensor, this gas monitor ensures accurate measurement with excellent repeatability and short response time.
2. [3 Alarm Mode] The gas detector features sound, light, and vibration alarms when detecting gases, allowing for prompt and effective notification. High and low concentration alarm values can be set.
3. [Multiple Charging Options] This gas tester is rechargeable and can be charged using USB from a computer, car, power bank, and other convenient methods.
4. [Backlit Display] The gas monitor has a high resolution backlit screen that provides clear readings day and night, ensuring visibility even under sunlight or low light conditions.
5. [Wide Application Range] This versatile gas detector can be used in various fields, including marine, chemical, agricultural, laboratory, mountaineering, pharmaceutical industries, and more.

Spec:
Item Type: Gas Monitor
Material: ABS
Model: ST8904
Battery: Lithium battery 3.7V 1800mAh (built in)
Basic Parameters:
CO: 0-999 ppm
H2S: 0-500 ppm
O2: 0.0-30.0% VOL
LEL: 0-100% LEL

How to Use:
Turn on the device to use directly.

Package List:
1 x Gas Monitor
4 x Accessories
1 x USB Cable
1 x User Manual
1 x Storage Bag