Equip your Luminox watch band with the added function of a compass. Luminox compass watch accessory has a durable black Polycarbonic case and is water resistant to 3 ATM. Fits on 22mm up to 28mm watch straps. This watch attachment is invaluable tool and accessory for your Luminox watch. This compass is made to fit 3050, 3500, 3740, 3780, 3950, 8800 and 8830 series of Luminox Watches.