Open/Short wiring test. Connected wires display. No connection/No terminator indication. Wrong connection/Non-parallel connection display. BNC terminator 25ohm/50ohm indication. Battery good or battery low indication. Ethernet 10Base-2 terminator value detection. Fast reaction during test process. One step operation. Specifications : Battery indicator LED display Maximum cable length : 600 feet (RJ-45/RJ-11/BNC) Power support : 9 V battery Dimensions : 143 x 85 x 25 mm Certification : FCC Class B; CE Class B