For sale is an opened box (never used) like new Gemini XM-16 UHF wireless microphone. These microphones are commonly used with DJ's and karaoke systems. If you go to a karaoke bar you can bring your own microphone if they use the same frequency range. This microphone requires a Gemini 16 channel UHF receiver to operate. It will work in the newer 682-698 Mhz frequency range systems. It has never been used and looks like new, but I did lightly scratch my initials in the bottom w it's hard to see. You'd never notice unless you search. You may be able to see this in the second pictureI purchased this microphone new in June 2009 taken out of a carton UX-16M system that contained a transmitter and receiver system. But, I discoverd that I can't use it because my receiver is an older receiver (UX-1620) that uses the 790-806 Mhz frequency range. I don't want to try to return it because I lightly scratched my initials on the bottom before I even checked to see if I had the correct microphone. This microphone operates on any one of 16 selectable channels using the frequency range of 682-698 Mhz. It has four switches inside the battery compartment to manually select a channel to match a channel on the receiver. The four switches can be combined to offer 16 different channel combinations. This is Gemini's newer frequency range used on most of their newer wireless UHF microphone systems. You can look up the specifications of your Gemini wireless receiver to see if it uses these frequencies. If so then it will work on your system. Please check your receiver's actual frequency range before you buy. The 790-806 Mhz range was used on older models and may still be sold if it is old stock. The newer replacement frequency range for 16 channels UHF being used is the 682-698 Mhz range because of FCC mandates. The microphone and receiver model numbers alone will not tell you what frequency range is built into it. Apparently they sell the same model numbers with different available frequencies. So, check actual frequency tags inside the microphones you currently have, or look inside the paperwork that came with your receiver to determine the actual frequencies. The frequency range used is printed on a tag inside the microphone's battery compartment. So, if you currently have a Gemini UHF system then you can see if your current microphones match this frequency range and add this new microphone to your system. Or, you can look up your Gemini receiver model specifications in the included paperwork to see if it uses this frequency range 682-698 Mhz. This microphone was purchased new out of carton from a dealer. It should operate properly with the right receiver. But, I am selling as a final sale without returns because I'm not a dealer. It should function as new. It requires 2 AA batteries not included. You can save a lot of money if you buy it The lowest online price that I've seen is $79.00 US dollars without shipping. That's what I paid. --PayPal auction only--. International buyers be sure to check shipping calculator with your actual postal code and pay the full shipping determined, or I will file a PayPal dispute.