This is the XS Scuba QuikVu Northern Hemisphere Compass for Scuba Diving Features: Large gun sight style viewing window allows for easy and accurate navigation Strong magnets guarantee accuracy and quick response time Large, secure 360Adeg ratcheting bezel Compass has a luminescent dial resting on a precision sapphire jewel Reads accurately over a large tilt range Bungee Mount to forearm with one continuous loop or two separate loops for redundancy Clip N Go This versatile mounting boot can be attached using a retractor, coil, or lanyard Hose Use on standard rubber HP hose, or using an adapter sleeve (included), clamp on to a thin 8 mm Miflex braided hose Wrist The glove-friendly buckle and strap assembly has depth-compensating corrugated ribs to keep the gauge snug at depth. The XS Scuba QuikVu NH Compass for Scuba Diving provides easy and accurate navigation with a large gun sight style viewing window, strong magnets for quick response time, and a luminescent dial. Its 360Adeg ratcheting bezel and large tilt range ensure accuracy.