Thank you for viewing! This listing is for a genuine Alto Works white meter for HA21S and HB21S models! I purchased this used about two years ago and installed it. I was using it until recently, so I believe it works without any problems! The LEDs have also been changed to blue! When I bought it used, there were many scratches on the lens of the meter, and there were lines that looked like they were made with a marker. If you have any questions, please feel free to comment!