I have armpits tens unit. Do I use all the leads black and white. I don't have a user manual?

Color should make no difference you hook the bottom lead into the tens unit then in most cases it has 2 male ends at the other ends of the leads you push each on into a female end that is on the pad and apply it where you need to turn on the machine anytime and find the level that feels the best to you and increase the power to a comfortable level very simple you don't worry about the colors of the wires they are all the same on the ones you put in your pads hope this helps and good luck i swear by my unit if possible don't put the pads in the same place each time..or you well get rashes etc..good luck.

My physical therapist showed me how to use my TENS unit. There were 2 wires that plugged into what looked like a remote control device. At the other end the 2 wires became 4 wires. From the 4, 2 had red ends, and 2 had black ends. You're supposed to hook them all up, and place the electrodes in a 'square pattern' surrounding the area of pain. You place the 2 red ones diagonally from each other, same with the black ones, in kind of criss-cross pattern. The electrical current is supposed to cross over like a big "X" with the middle of the "X" being the center of your pain. Hope this helps. In your case, sounds like you have black and white, rather than black and red-but it's probably the same principal. You might want to call the manufacturer just to make sure