New Retro look with black mesh steel speaker grill, this little yellow speaker needs no battery just screw it on to your existing CDV-700 phone jack and enjoy the sweet audible clicks from your vintage Geiger Counter.  It has a pronounced audible click using  a tuned piezoelectric speaker chamber to give maximum audible output clicks. CNC Machined and painted to match the CDV-700. Designed and constructed in USA by Me. Online future website coming soon.... You may return the Great Little Yellow Speaker for any reason if not satisfied for a complete refund. Don't forget to look at my other style of speakers listed lower down the page...  See all my other speaker designs Click on (See other items) on right side of add....  What you will get.... 1- Great Little Yellow Speaker