Check the listing for details. Extech Hygro Thermo-Anemometer model 407412. Condition: Used. Listed at 125.95 USD. Working Unit.. Battery will come with! The battery closure tab is looking like it might break off so I did not want to remove the battery after putting in mine for testing so I will be including the 9V battery with the sale. Both probes are working. all buttons function. Unit comes with hard case, 2 probes and instruction manual. General SpecificationsDisplayDual function, 4-digit (9999 count) LCD displayUnits of measurem/s (meters per second), km/hr (kilometers per hour), ft/min feet per minute), knots (nautical miles per hour), mile/hr (miles per hour),°C/°F, %RHData holdHolds reading on the LCD display when button is pressedSensorsAir velocity sensor: Twisted vane arm with low friction ball bearing;TemperaturePrecision thermistor; Humidity: Thin film capacitorMax/MinRecord Records highest and lowest readings for later recallData OutputRS-232 serial PC interfaceOperating Temp.32°F to 122°F (0°C to 50°C)Operating Humidity Max.80% RH.Power Supply9V batteryPower Consumption Approx.8.3 mA DCWeight0.77 lbs. (350g)Dimensions Meter7.1x2.8x1.3" (180 x 72 x 32mm)Anemometer Probe0.7" (17mm) Diameter x 6.7" (170mm)AccessoriesAnemometer/temperature and RH Probes, 9V battery, & caseft/min (feet/min)Range80 - 4921 ft/minResolution1 ft/minAccuracy± (2% + 20 ft/min)m/s (meters/sec)Range0.4 - 25.00 m/sResolution0.01 m/sAccuracy± (2% + 0.2 m/sec)km/h (kilometers/hour)Range1.4 - 90.0 km/hResolution0.1 km/hAccuracy± (2% + 0.2 km/hr)mph (miles/hour)Range0.9 - 55.9 mphResolution0.1 mphAccuracy± (2% + 0.2 mph)knots (nautical miles/hour )Range0.8 to 48.6 knotsResolution0.1 knotsAccuracy± (2% + 0.2 knots)TemperatureRange32°F to 122°F (0°C to 50°C)Resolution0.1°F/°CAccuracy±1.5°F (±0.8°C)Relative HumidityRange10 to 70% RHResolution0.1%Accuracy±3% RHRange70 to 95% RHResolution0.1%Accuracy±4% RH Step into our world of curated finds, sourced with care from estate sales and auctions. While the origins of these treasures may hold mystery, our commitment to transparency shines through in our detailed, high-quality photos. Need more info? Just ask—we're happy to provide additional images or details upon request. Rest assured, any notable flaws or damage are diligently noted in the item's condition section below the title or in our detailed pictures. Your satisfaction is paramount, which is why we stand behind our offerings with a 14-day return policy, no questions asked. Don't stop here—explore our other listings for more hidden gems. And when you find multiple treasures, enjoy combined shipping.