The UW-500 offers 4 output stackers, ideal for smaller sorting operations where only one or two sorting operations are required, such as fit/unfit, face up/face down.
The UW-600 offers 8 output stackers, ideal for multiple denomination sorting, where fitness and facing is not necessary or where a second pass can be used to perform additional sorting activities, or when banknotes are pre-sorted to some degree (eg: fitness).
UW-500
UW-600