1. Industrial-grade sensor, high precision, real data, strong stability, real-time detection 2. Four alarm mode (sound, light, vibration, display) is not easy to ignore, high security, high and low alarm value can be set free 3. High-strength Plastic material, waterproof, dustproof, explosion-proof, three anti-design 4. Simple operation, bilingual, three buttons, powerful, LCD screen. Chinese and English bilingual settings Detection Gas Types: EX, H2S, CO, O2 Display error: Less than 5% Display time: T Less than 30s Indicating mode: LCD liquid crystal display real-time data and system status, lighting, vibration and human voice (Chinese and English) prompts. Working Environment: temperature: - 20℃ - 50℃; humidity: Less than 95% RH condensation Working Voltage: DC3.7V (Lithium Battery Capacity 1800mAh) Charging time: 4h-6h Standby time: It can be used continuously for more than 10 hours under full power condition. Sensor life: 2 years Protection Level: IP65 Voltage: AC220V Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on colour: As Shown material: Plastic Package Contents: 1 x 4 In 1 Gas Detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.