Go onto Horizon Hobbies web site and look at there items, I have been very happy with all there equipment. I use the high end tach, TNC but I have tested it against several of the Volt Meter/Tach that Horizon sells and so far I haven't found a bad tach in the bunch. May as well get a two in one meter, both volt and tach. It will be with you for a lot of years.