Monitor Control Unit ideal for BVM Series monitors including BVM-E251/E171. The 19-inch rack-mountable BKM-17R monitor control unit gives you control of the BVM-E251/E171 Series monitor. It can also control the BVM-X Series*, BVM-E series*, BVM-F series*, BVM-L Series*, PVM-A/LMD-A series* and PVM-X550*. A USB memory is used for storing captured data. One BKM-17R can control up to 32 BVM monitors. *The supplied AC adaptor of the BKM-17R can be used when you need to connect it with these monitors. An optional SMF 17R20 can be used with the BVM-E251 or E171 to power the BKM 17R from the monitor.