Tactical True Apparent Wind Display RepeaterThe Clipper True Wind Display shows apparent wind speed and direction, when connected to a log or GPS, it can also show true wind speed and direction.Requires NMEA boat speed input either VHW from log or RMC from GPS for True wind speed and direction.Features: Supply voltage nominal 12 Volts Supply current 10mA + (10mA for back light illumination Max) NMEA input sentence MWV Back light - 9 levels Pointer style - 2 Display wind speed - 0 to 99 Kts Display Wind angle - 0 to 360 degrees represented by 60 segments Display case size 110 x 110mm This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. Specifications: Instrument Function: Wind Box Dimensions: 4"H x 8"W x 10"L WT: 1.2 lbs UPC: 799439091801