UK-1 makes it simple to reproduce the authentic sound of your uke without modification. Simply slide the UK-1 onto the tie block and retighten the strings. UK-1 fits most soprano, concert, tenor and baritone ukuleles with a tie block. This passive piezo system is designed to work flawlessly with your favorite acoustic amplifier or colored via your preamp of preference. 1/8" to 1/4" cable included. specifications Weight 3.1g / 0.109oz Overall length 74____ / 2,91" Height / jack housing 9mm / 0.35" Active element measurements Lenght 55mm / 2.17" Width 7.75mm / 0.31" Thicknes 1.5mm ± 0.05mm 0.059" ± 0.002" Wood White beech Maximum Impedance 500 ã_ Cable 2.5meter / 8'