Whether you are an experienced player or just a beginner this is the solution that is easy to use and won’t break the bank. The WST-640U Ukulele Mate by respected Tuner and Metronome manufacturer Cherub is reliable and easy to use. It includes a CR2032 battery that lasts for ages and is cheap to replace. The Cherub WST-640C is an auto-on chromatic tuner. Its auto power is on when the tuner head stands up, its auto power is off when the tuner head falls down, and its auto power is off in 5 minutes if there is not any input signal.