3 different tones selected from front panel ; F-connector port for toning & tracing of coaxial CAT-5 cabling systems ; Normal & half tone amplitude ; Constant tone amplitude over life of battery ; Auto off after 3 hours to conserve battery life ; Separate talk battery status for increased voltage & power for test sets ; RJ jack allows use of modular cable or alligator clips ; Low-battery indicator ; Includes 9V battery;