The tone is clear and bright, warm and thick Passive Pickup + Noise Reduction = is a passive guitar pickup (). It uses a magnetic field to collect the vibrations of the strings and transmit them to the speaker, of the external environment, thus effectively reducing noise. Easy to install = Mounts in the sound hole, no drilling required. Sound hole diameter range: 3.8inch/96.6mm~3.94inch/102mm. Note: For 6-string acoustic guitars, but not for 3/4 size acoustic guitars The sound is in terms of graininess as well as detail and dynamic presentation. Low-profile, high-impedance design, Achieve superior string balance and bright acoustic clarity Low-profile, high-impedance design does not require batteries Easy installation, no modifications required, right out of . Superior string-to-string balance and clarity of sound. Colour:black Material:metal+plastic Package Contents: 1 x Liuxian guitar pickup 1 x Screwdriver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.