Martin MA540TPK3 Authentic Acoustic Lifespan Treated (3 Packs) Guitar Strings - Light 12-54 bench Constructed with 2-plies of 7-mil

Constructed with 2-plies of 7-mil and 5-mil Clear film

and other similar devices

use the ⅛-inch stereo input to plug in your smartphone

Sensitivity (ANC Microphone): -36 dB

Martin MA540TPK3 Authentic Acoustic Lifespan Treated (3 Packs) Guitar Strings - Light 12-54 bench Constructed with 2-plies of 7-milNext generation Martin Authentic Acoustic Lifespan 2. 0 strings are engineered using a new, patented anti corrosion treatment only available from Martin. It protects the core and wrap wire to prevent corrosion without compromising tone or feel. Our impeccable standards for acoustic guitar tone are embedded in our string design and precision manufacturing process. Thats why we make our own.