Nielsen Kellerman 835 Kestrel 3500 Pocket Weather Meter YellowCategory: Kestrel 4000 PocketOur products are designed and engineered to give our customers accurate and reliable measurements. Our sales literature and specifications are honest and complete. We don-t sell snake oil. Nielsen Kellerman has always been managed and led by its owners. The owners started NK because they valued their independence no less than they valued the integrity of their products.-NK is a vertically integrated company. We design, manufacture, and service all our products. We treat our manufacturing operation as an asset, not a liability and we use this asset to insure the quality and performance of our products. NK is a technology user, not a technology creator, but we are innovative and all of our products share the quality that they provide our customers with solutions others have failed to provide. NK chose very early on to promote and sell it products worldwide.- Real time clock. Waterproof and floats. Large easy to read display with backlight.