My chromatic tuner died this spring. At first I thought there was a problem with a battery, or the battery contact. I’ve changed the battery couple of times and added a bit of duct tape to keep it firmly in place. Still, it required me pressing on the battery compartment (squeezing the electrons out?) to make it go. And then, even that stopped working.
During my last visit to Cambridge I ventured to the very same music shop in a hope to buy a replacement. There are not selling Crafter tuners any longer. However, the shop assistant did show me a selection of gadgets and recommended this model as the one that works well both on string and brass instruments. (He said he himself plays trumpet and clips this tuner to the bell.) So I bought it.
It is a great little gizmo and so far it has been working just fine. The “pitch” button is used to calibrate the concert A between 430 and 450 Hz. The “item” button allows to switch between the instrument (guitar, bass, violin, ukulele) and chromatic (keys F, B♭, E♭ and, naturally, C) modes. Finally, the “flat” button makes the E♭ tuning and D tuning of guitar and bass a piece of cake. (It is not that difficult anyway.) The clip provides two rotational degrees of freedom and can be swapped between the left and the right side of the tuner. The LCD display looks as if taken from some vintage sci-fi movies. Last but not least: black is cool but metallic red is even cooler.
You can buy yourself one from Amazon for one-third of the price I paid in the shop.