The Diagnostic Box TDB001 Remote Control IR/RF Tester is a compact, easy-to-use tool for quickly verifying signal output and frequency from IR and RF remote controls. Designed for global compatibility, it helps ensure remotes operate on the correct frequency—especially useful for imported vehicles. The unit features a magnetic back for convenient mounting, runs on 3 AA batteries with 40+ hours of use, and includes auto power-off and a low battery indicator. A backlit 3.5-digit display ensures visibility in all lighting conditions.