Brannan Heavy Duty Multi-Functional 5-In-1 Meter

5-in-1 meter for wind speed, light, sound level, temperature and humidity measurement Large LCD with green, yellow and red indication Max min / AVG / data hold functions Low battery indication Audible alarm Auto power off CALIBRATION CERTIFICATE INCLUDED General instrument specifications:AVG: Average of the latest 10 readings.Audible alarm: Alarm sounds for 20 seconds, pauses for 1 minute then repeats cycle (the alarm can be turned on or off by user).Overloading display: Display €œLO€ under range and €œHI€ over range.Operating conditions: -20 to 60°C (-4 to 140°F) & 10 to 75 %RH.Auto power off after approx. 15 minutes of inactivity (can be switched off by user).Battery: 3 x AA batteries or USB type-C cable.Battery life: Approx. 30 hours.CE & RoHS/WEEE: Compliant.LCD dimensions: 55mm x 48mm.Product dimensions: 242mm x 68mm x 30mm.Product weight: 292g. Air velocity specifications:Range Resolution0.5 to 30 m/s 0.11.75 to 105 km/h 0.1Measuring: 98.4 to 5905 ft/min 1.00.97 to 58.3 knots 0.11.11 to 67.0 MPH 0.1150 to 9000 CMM 1.0787 to 47244 CFM 1.0Accuracy: Reading ±3% ±0.3dSampling rate: 2 times/secArea set: 0.1 to 9999 CM², M² or ft²Measurement units: m/s, km/h, ft/min, knots, Mph,Grade indication: Yes3 colour LED alarm: 3 colour LED indication Light meter specifications:Measuring range: 0 Lux to 200K Lux,0Fc to 20KFcAccuracy: ±3.5% rdg±8dgts.(±4.5% rdg±10dgts.(>10,000Lux)Spectral response: CIE photopic (CIE human eye response curve)Spectral accuracy: CIE Vλ function f1' ‰¤6%Cosine response: f2' ‰¤2%Data update: 2 times/secPhoto detector: One silicon photo diode with filterVisible alarm: 3-colour LED light alarmGreen light: Yellow light: 500 to 1000Lux,Red light: Alarm beeps when reading goes above 500Lux. Sound level meter specifications:Measuring range: Auto: 35dB to 130dBAccuracy: ±2.0dBDisplay: 4digtsResolution: 0.1dBFrequency response: 31.5Hz to 8kHzStandard: IEC61672-1 CLASS2Frequency weighting: dBATime weighting: (SLOW) 1Microphone: 1/2 inch Electric condenser microphoneAlarm: Alarm beeps when reading goes above 60dB. Temperature specifications:Range: -20 to 60°C (-4 to 140°F)Accuracy: +/-1.0°C (+/-1.8°F)Resolution: 0.1°C/F Humidity specifications:Range: 20 to 100%RHAccuracy: ±5%RH between 35 and 80%RH, otherwise±7%RHResolution: 0.1%RH