Paladin's best-selling 1577 PC Cable-Check Pro tests all PC, Mac, video network and coaxial cable assemblies. It maps cables and detects good connections along with opens, shorts and crosses. This tool performs true cable mapping. It's easy to read and understand with LED indicator lights. Model 1577 features auto scan and manual modes. To select auto, hold the "TEST" button for five seconds. Use this unit to test the following patch cables up to 1000 feet: LAN, telephone, 50-µ: coaxial, 75-µ: coaxial (up to 600 feet), VGA, S-video, PS/2 keyboard, serial, USB, Mini-USB, FireWire and parallel printer. The 1577 features male and female D-sub, including DB9, DB15, DB25 and HD15 (VGA). It's equipped with RJ11, RJ12 and RJ45 modular plugs. This unit also has BNC female coax, A and B USB plus five-pin Mini-USB. It's supplied with Mini-Din, including six male and female (PS2 keyboard and mouse) plus four female (S-video). This tester also features six-pin and four-pin IEEE 1394 FireWire plus 36-pin Centronics female printer. Power shuts the unit off after 30 seconds of non-use to extend battery life. The rugged case has a built-in handle for easy support and storage. Rubber feet grip to desk or bench to prevent slipping. Includes 9-volt dc battery. Model 1577 measures 12" x 6.65" x 1.6".