The ukulele is a string musical instrument, from the guitar family, originally from Hawaii.
It is built in various sizes that result in different timbres. The main ones are (from smallest to largest) soprano, concert, tenor and baritone.
It usually has four strings, but there are also six and eight string models (in both cases, grouped into four orders).
In the characteristic tuning of the Ukulele, the fourth string is sharper than the third, Sol, Do, Mi, La.