Environment Tester Temperature Humidity LX Height Air Pressure Noise Detector for Library Outdoor Workshop DC 5V Item Type: Environment Tester Material: ABS, PVC Display: LCD Screen Charging Voltage: DC 5V Battery: 1 x Lithium ion Battery 400mAh (Built in) Functional Parameter Reference Table: Temperature (℃): Range: -20-60 Resolution: 0.1 Error: ±0.2 Temperature (℉): Range: -4-140 Resolution: 0.1 Error: ±0.2 Humidity (RH): Range: 10%-99% Resolution: 0.1 Error: ±3% Illuminance (LX): Range: 0-199999 Resolution: 0.1 Error: ±5% Illuminance (FC): Range: 0-199.99 Resolution: 0.01 Error: ±5% Altitude (M): Range: -700-9000 Resolution: 0.01 Error: ±0.5 Pressure (hPa): Range: 300-1200 Resolution: 0.01 Error: ±20 Noise (dBA/C): Range: 30-130 Resolution: 0.1 Error: ±5 Illumination Reference Table: 75-30 LX: Warehouse, Garage, Darkroom, Lounge 150-75 LX: Corridor, Toilet, Storage Room, Passage, Guest Room 300-150 LX: Classroom, Hall, Restaurant, Ward, Living Room 750-300 LX: Laboratory, Meeting Room, Kitchen 1500-750 LX: Hallway, Operating Room, Counter, Workshop 3000-1500 LX: Super Accuracy Workshop 10000-300000 LX: Visual Function Examination Room