be careful to check the power plug on your litermeter first By drsalomon on 11/22/13
drsalomon would recommend this product to a friend
I purchased this unit but it does not work with my litermeter 3. It is very confusing because spectrapure changed the power input plug that exists on the litermeter that this TCM must connect to. I incorrectly assumed that my generation 6 (latest generation model) would have the most recent power plug. The old style power plug looks like a mini headphone jack. The new power plug is a more standard round hollow plug you see attached to most power bricks. If you have the headphone plug style 12V connector, BRS does not sell the TCM that works with this and you need to go directly to spectrapure. I was able to exchange the TCM I bought from BRS with the old style TCM by contacting spectrapure sales support. The current litermeter 3 manual for the units with the new style plugs has pictures of the old style units making it even more confusing to know that their are different plugs on the currently shipping units.