 |  | | | * Four selectable scales: MPH, Knots, km/h or m/s * A single 9-Volt battery (not included) powers the LCD for up to 70 hours of continuous use. * Readings up to 125 MPH in one of four modes: instantaneous velocity, highest gust since reset, 2-minute or 5-minute wind speed average. * Cup rotor is 5.88" in diameter when extended.
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