Originally I bought one of those cheap Chinese fake pinpointers, and for a few weeks it worked – not well, but it worked. Then it got an intermittent fault where it just stopped detecting anything, the light came on when you pressed the button but there was no sound, etc. …
Really, all the equipment you need for metal detecting is a detector and a spade to dig up your finds. However, most people buy a lot more equipment than that.
Here’s a brief look at the Detector and Accessories I use.