Silent and eye-catching! This amazing little demo device uses just one length of non-coiled BioMetal Muscle Wire and a clever mechanism that creates surprising motion! Sound sensitive driver makes it move with a hand clap or a button push. Includes: Fully assembled and tested “arm”, driver circuit, AC adapter, & instructions. You'll be impressed! 1 Kit Each BioMetal Arm Demo Kit DIYBMA$149.99 Copyright © 2003-2009 E-Clec-Tech. All rights reserved. All other materials and logos are copyrighted by their respective owners, or companies.