A / B Box Directs the instrument signal to two different targets Can be switched between the individual paths as well as use both at the same time 6.3 mm Jack input 6.3 mm Jack output a and b Additional 6.3 mm jack output (Thru) Very sturdy, metal casing suitable for use on the road High quality switches and sockets Can be operated with a 9V battery or optional power adapter Made in the USA