Mercury5 is fully compatible with Mercury4 interfaces and deployments, and supports the same high levels of network, security, developer and other functionality, including fully optimized support for EPC Generation 1 Class 1 and Class 0 and ISO 18000-6B, as well as EPC Generation 2.  Like its predecessor Mercury4, the new Mercury5 fully supports Dense Reader Mode. But it goes well beyond DRM to ignore all interference - not just interference from other DRM-compliant readers. As a result, Mercury5 outperforms DRM-only readers anywhere there are multiple sources of interference. This is why it gives more 100% reads more often.