"Take your adventures off the beaten path with Silva's Guide Explorer 2.0 Compass. Contoured baseplate fits in your hand comfortably, while its extended design includes an inch ruler and 1/10-mile scales for USGS 1:24,000 and 1:62,500 maps. Integrated magnifier helps read the fine details on maps and charts, while declination scale ensures accuracy. Illumination allows simple reading in any light conditions. Built-in lanyard for on-the-go convenience. 4.4""L x 2.2""W x 0.4""H. Weight: 2.4 oz.Manufacturer model #: 544905. Contoured baseplate Extended design includes an inch ruler and 1/10-mile scales for USBS 1:24,000 and 1:62,500 maps Integrated magnifier Declination scale Illumination for low-light reading Built-in lanyard"