Product Name: Gas Detector for Various Gases Measuring gas: flammable, oxygen, carbon monoxide, hydrogen sulfide Display error: less than or equal to 5% FS Response time: less than 30 seconds Indication method: LCD displays real-time data and system status Indications for alarm, fault, and undervoltage through LED, sound, and vibration Working environment: Temperature: 20��C to 50��C; Humidity: less than 95% RH without condensation Working voltage: DC3.7V (Lithium battery capacity 2000mAh) Charging time: 6 to 8 hours Standby time: more than 8 hours Protection class: IP65 Size: 130x65x45mm Weight: approximately 0.5kg Colour: orange Material: ABS Package Contents: 1 x Multi 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 to differ slightly from the real thing. The measurement allowed error is +/- 1-3cm.