3-3/8" (85MM) ViewLine Synchronizer -500/+500 RPM - 8 to 32V - White Dial & BezelOn pleasure boats with twin engine installations, the ViewLine synchronizer is an indispensable aid to ensure correct synchronized running of both units.Specifications: 8 and 14 pole Tyco / Hirschmann bush housing Operating voltage 8 - 32 V Accuracy +/- 2.5 % of full scale reading Anti-fog double lens Protection rating front IP67, rear IP52 85 mm installation diameter 50 mm installation depth Operating temperature range -20 AdegC / +70 AdegC Reverse polarity protection This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. Specifications: Gauge Type: Synchronizer Gauge Size: 3-3/8" Voltage - Input Range (Volts): 8-32v Box Set: No Series: ViewLine Box Dimensions: 4"H x 8"W x 8"L WT: 0.75 lbs UPC: 7640178722262