TRUTH IS THIS WAS AT THE BOTTOM OF ONE THE BOXES I HAVEN'T UNPACKED FROM MY OLD BRICKS MORTOR STORE! I HONESTLY DON'T KNOW MUCH ABOUT IT, BUT HERE IS WHAT I DO KNOW: WHEN I DEPRESSED THE SPRING LOADED CONTACT IN THE BATTERY CHUTE, THE POWER LIGHT ILLUMINATES, WHICH YOU CAN SEE IN THE IMAGES. PUTING A VOM TO THE CONTACTS INDICATES APPROXIMATELY 25 VDC. I DARE SAY IT'S ACTUALLY FUNCTIONAL, BUT IS "AS IS" AND I'M PRICING THIS AT BELOW THE LOWEST SOLD COMPARIBLE UNIT . ALL OFFERINGS ARE AS IS WHERE IS, ALL SALES FINAL, ALL IMAGES AND TEXT ARE FULLY OWNED AND PROTECTED FROM USE WITHOUT PERMISSION: PAYMENT IS REQUESTED WITHIN 48 HOURS OF CLOSE OF THE OFFERING - IF YOU HAVE SPECIAL NEEDS, PLEASE LET ME KNOW BEFORE YOU BID - I DO TRY TO ACCOMMODATE! I CAN'T GUARANTEE NEXT DAY SHIPPING, BUT I'M USUALLY PRETTY FAST - SEE MY FEEDBACK!