The Ideal 33-855 Data Cable/RJ45 LCD Wiremapper is designed to test RJ45/8 conductor cables exclusively. The tester features a backlit LCD screen with a numeric display to identify the Pass/Fail status of the wiremap test as well as a pin-by-pin display of opens, shorts, miswires, and split pairs. This unit also features single-button operation cycles through testing, toning, and device power options. When the Data test is activated, the Ideal 33-855 checks each conductor of the cable for any opens (terminated or cut conductors), shorts (cut or nicked conductors that come into contact), miswires (wires out of order – not consistent at both ends), reversals, or split pairs (wired correctly but using wrong conductor order and grouping). For all tests, the included main remote is used to terminate the far end of the cable run. The main remote is stored in the base of the tester when not in use. A built-in analog tone generator has 3 user selectable tones which can be applied to the RJ45 port by pin, by pair, or all conductors. This is used to help locate and identify a single cable that is within a bundle of cables. The tone generator has the ability to tone by pin, by pair, or by all conductors at once. This allows the user to more precisely locate errors within the cable, such as finding opens. The 62-164 or 62-144 Amplifier probe (sold separately) is recommended for use in amplifying the tone signal. Users of the Ideal 33-855 are provided with 2 AAA 1.5V batteries.