The E-Series medium-size multicavity Reverberation Chambers (Passive, Active and Time-Domain MIMO OTA Testing 400 MHz to 6/40 GHz) represent the state-of-the-art in reverberation chamber technology. The E-Series can make single measurements, batch tests, protocols or campaign tests for different frequency bands, different technologies and different channel models, running overnight without human intervention. Embedded frequency-, mode-, source- and platform-stirring in a double-shielded set of cavities allow Passive MIMO (Efficiency, Correlation, Diversity Gain, MIMO Capacity and others), Active MIMO OTA (TRP, TIS, TPUT, MTS, CQI, M2TxDT, RSRP, MCL and others) and Time-Domain MIMO (DL/UL TCP/UDP/FTP TPUT, RMS DS, STD, PL, CBW, Mute%, eNodeB, VDT-OTA) measurements up to 8x8 and 8DLCC to be performed for antennas and devices up to 50cm and 50kg ranging from 2G to 5G, covering all available cellular and wireless technologies to date, including wearables devices, sound acoustic mute, WLAN and W-IoT testing. The E-Series can also test both 5G OTA in both Sub-6 GHz (FR1) and mmWave (FR2) frequency ranges for both Non-Line-of-Sight (NLoS) NIST and Line-of-Sight (LoS) scenarios up to 2x2 MIMO and 40 GHz. There is no RC in the market more advanced than the E-Series.