DESCRIPTION: 2 3/4" Easy to Read Direct Reading Dial; Adjustable and Removable with Bracket and Thumbscrews; Internal Green Night Illumination; Built-in Compensators to Easily Adjust for Deviation; Scientifically Matched Sapphire Jewel & Hardened Steel Pivot Dial Movement; Powerful DirectiveForce Magnets for Fast Heading Lock-on; Movable Sun Shield; High Temperature Composite Construction for Extended Operating Range. FEATURES: Card Graduations: 5.0 Degrees; Compensators: Integral; Back lighting: 12 Volt Dc; Body colour: Grey; Card colour: Blue; Card style: Conical; Card size: 70mm. DIMENSIONS: Height: 123mm; Width: 113mm.