The Rockboard Natural Sound Buffer is a op-amp based signal buffer that eliminates cable capacitance and loss of top end associated with long cable paths or using several unbuffered effects pedals. Its position in the signal chain shoul be assertained by experimentation depending on the effects pedals used to optimise your sound. Features: op-amp based signal buffer prevents signal loss in effects chains gives back presence and assertiveness to the overall sound Solid metal housing 6.3 mm mono in/output jacks power supply via optional 9V DC Adapter, 2.1 x 5.5 mm barrel, polarity (-) center battery operation not supported dimensions (W x D x H) 74 mm x 42 mm x 33 mm weight 92 g