It's got 3 buttons and a power level dial on the controller. 1 beeps, 1 beeps and shocks the last beeps and give a shock 2 levels higher than is selected on the dial. It has made my terrier a pleasure to take out again. I think I paid £99 for an ex demo one, it was worth every penny. It came with a charger, tester and a spare set of prongs.