The original CR:245/3 Portable Noise Analyzer has been on sale now for over five years. This analyzer allows for many options including GSM link, DAT recorder, modem, etc.
Cirrus have now developed a lower cost unit, in a small highly portable weatherproof case. It does not allow for the additional options but has the same powerful acoustic processor at its heart. The CR:245/3 with its multitude of options is still available and a CR:245/4 can be upgraded at a later date to have these facilities.