This tool is much like the ET64220 but with a much stronger tone to help deal with interference. This unit does not come with multiple adapters for your basic end-user applications and is geared more towards the pro side. The transmitter has three different distinctive tones you can choose from alone with a continuity test that lights up an LED when continuity is found. The receiver has a volume control dial and a button to press when searching for tone. It also has a light near the tip to indicate its find the signal from the transmitter if the sound is set low.
Each unit operates using two 9volt batteries. The battery cover on the receiver is located on the back of the rubber handle and is held on with one screw. The transmitter’s battery cover is located on the back of the unit. The clip on the back of the transmitter is the battery cover and it is held in place by 2 screws. These batteries can only be placed in the tool one way, so a diagram isn’t needed but one is on each unit to show where the batteries are located.