FeaturesAudio frequency 750cpsMaximum 100v outputFine Tune knob and LED's to easily match maximum impedanceInterrupter feature on oscillatorLCD meter on receiverReceiver loud speaker or headset useHoliday detection on buried pipe (PD/H)PD (Short Locator) Includes:Mark IV Receiver with batteryPD OscillatorHeadphonesBattery Cables (set) (Red / Black)30' Ground Cable (Black)6" Red Oscillator to Pipe Cable (Red)(1) 9v Battery (Mark IV Receiver)Carrying CaseInstructions ManualPD/H "Holiday Detector" Comes with everything above plus:Shoe Cleats (set of 4)Terminal Board (Single)Terminal Board (Double)30' Connecting Cable (White)Cleat Cables (Set of 4 -White)