Display: LED Screen Atmospheric pressure: 86 kPa - 106 kPa Sampling time: 1.5 seconds Detection temperature: -10°C to 50°C Relative humidity: 20% - 85% Storage temperature: -10°C to 60°C Power source: Lithium battery with 2000 mAh capacity 5V DC charging Product weight: 350 g Measuring range: 30–130 dB Noise detection: Electret Condenser Microphone Processor: ARM for high-speed complex calculations Color: Black + White Material: ABS Size: 270 x 90 x 35 mm Package Contents: 1 x Decibel Meter 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 +/- 1–3 cm.