Man guitar tuners come in all varieties now a days, but they all use the same notes. I would advise buying one that clips on to the headstock. I would advise against the brand Snark though. I guess they're popular(?) but the one I had broke in a couple places. It still functioned fine, but it didn't stay on the guitar very well. But the new one I have I think is built much better, even though it was significantly cheaper.