... STP RJ45, BNC 2, UL,CE,RoHS certificate Specification:1, Cable tester for Cat 5 and BNC!2, 2pcs ... transmitter/receiver design to test installed cabling or patch cables!3, Standard cable wiring ... Transmitter and receiver snap together for transport or patch cable testing!5, Extremely easy to use and understand ... have one RJ45 (8P8C) jack and one BNC jack.7, On/Off switch to conserve battery ...