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Anemometer ennoLogic eA990R - 8 Parameters: Wind Speed, Wind Chill, Air Temperature, Humidity, Heat Index, Dew Point, Barometric Pressure, Altitude – Digital Weather Meter with BacklightAmazon$22.47
Ear Ease Pain Reliever for Adults, Children & Senior Citizens-Natural, Safe, Non-Invasive, Fast Acting & Effective Earache Relief from Sinus Pressure, Altitude Changes, Swimming, Allergies, Cold & FluAmazonSAVE $12.00
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[Industrial-Grade Accelerometer+Inclinometer] HWT901B-TTL MPU9250 9-axis Gyroscope+Angle(XY 0.05° Accuracy)+Digital Compass+Air Pressure+Altitude, RM3100 Magnetometer Compensation and Kalman FilteringAmazon