THIS IS A 1 TO 1 PROP REPLICA OF THE ICONIC MEDICAL SCANNER USED IN THE ORIGINAL SERIES  BY DR. McCOY IN ALMOST EVERY EPISODE OF THE SERIES. IT NEEDS BATTERIES. THEY GET SOLDERED TO THE POWER LEADS INSIDE SO THIS ISN'T A REPLICA FOR SOMEONE WHO ISN'T A HANDS ON COLLECTOR.Very nice looking display piece at the least. LLAP