Newark
frequency counter; bandwidth:225mhz; arming mode:auto, manual, external delay; certificate of calibration:yes with data; frequency resolution:10 digits/second; impedance:1mohm; input filter type:switchable; no. of channels:2 ;rohs compliant: na
http://www.newark.com/jsp/search/productdetail.jsp?SKU=60K74... 
base 
