D'Addario Zyex Violin String Set, 1/8 Scale, Medium Tension Acoustic Bridges the B2520 PRO has a

the B2520 PRO has a wide frequency response of 50 Hz - 18 kHz

And what a tone it is

Comes with braided single conductor lead wire

and probably the coolest feature

D'Addario Zyex Violin String Set, 1/8 Scale, Medium Tension Acoustic Bridges the B2520 PRO has aScaled to fit 1 8 size violin with a playing length of 9 1 2 inches (241mm), these medium tension strings are optimized to the needs of a majority of players. Packaged in uniquely designed sealed pouches providing unparalleled protection from the elements that cause corrosion. Zyex synthetic core strings produce an extremely warm, rich sound. Zyex strings are made from a new generation of synthetic material, creating strings that are incredibly stable