Southwire Tools & Equipment M500CX4 Coax Continuity Tester/Mapper KEEPING IT SIMPLE: Easy-to-understand LED display. COMPATIBILITY: Test patch cables or installed cables FUNCTIONALITY: Identify up to four coax cable remote locations - includes 4 color-coded id remotes DURABLE DESIGN: Double-molded housing for durability and grip AUTO POWER-OFF: Saving power when the device is not in use. SATISFACTION GUARANTEED: At Southwire, we strive to ensure that every product we develop helps increase safety, improve productivity, reduce manpower, save time and save money - both on and off the jobsite. After all, we don't just want to produce the most products. We want to produce the best products.