Vetra Systems Corporation
KVM solutions that work
 Multicast USB Keyboard & Mouse output to as many as 4 PCs simultaneously

USB-844-KM-BC 4 port USB Keyboard & Mouse Multiplier / Multicaster
 USB-844-KM-BC 4 port USB Keyboard & Mouse Multiplier / Multicaster

Connect one USB Keyboard & Mouse to four USB PCs

4 port USB keyboard & mouse Multiplier / Multicaster, the USB-844-KM-BC MegaCast

If you want information about the VIP-345, please click here.

For broadcasting to 5 PCs, please click here.

For broadcasting to 10 PCs, please click here.


The USB-844-KM-BC "MegaCast"™ 4 Port USB Keyboard & Mouse Multicaster routes the output of USB HID devices, such as USB keyboard, mouse, bar code scanner, including 2D bar code scanner, or USB touchscreen to as many as four PCs simultaneously. Connecting units in series gives up to 10 ports. It is idealy suited for applications requiring redundant keyboard and mouse or HID device input, such as the testing and administration of multiple PCs. Our low device latency provides optimal performance for multiboxing applications on MMORPG's such as World of Warcraft. The USB-844-KM-BC Keyboard & Mouse Multicaster is compact, easy to install, and supports all USB keyboards, USB mice, bar code scanners, USB touch screens, and some gaming devices.

At the heart of the USB-844-KM-BC "MegaCast"™ USB Keyboard & Mouse Multicaster is Vetra's advanced, US patented TruReflekt™ technology, which provides and supports true USB functionality through the Multicaster. The connected keyboard, mouse, or HID devices, enumerate correctly and may be "hot-plugged" at any time, and the connected PCs may be powered up and down in any order. This unique architecture of the USB-844-KM-BC "MegaCast"™ USB Keyboard & Mouse Multicaster ensures error free boot up and device driver loading for each connected PC, and allows the Multicaster to operate transparently with
all USB compatible PCs, PC operating systems, and applications. For applications requiring rack mounting, an optional 2U height rack mount tray is available (see Accessories ).

All Vetra KVM Products are designed and manufactured in the USA for enterprise mission-critical applications for use around the world and are backed by a Limited 3-year Warranty. For more information on this product or our complete line of KVM solutions, please contact us at


After all connections are made and the PCs are powered up, the front panel power indicator will illuminate indicating that the unit is ready to transmit keyboard and mouse data. Additional LEDs indicate which PCs are powered (PC STATUS). Any data from the connected keyboard and mouse will be routed to USB ports of all powered PCs simultaneously.

All shifted keyboard functions will work properly, however, due to design constraints, keyboard back link commands issued from the PC may not be passed to the connected keyboard. What this means is that if you set the CAPS LOCK button on your keyboard, the keyboard will generate shifted (capital) characters, but the CAPS LOCK indicator LED on the connected keyboard may not be illuminated.


  • Designed and manufactured in the USA for use around the world
  • Backed by a Limited 3 Year Warranty
  • Patented technology provides full USB functionality through the MegaCast™!
  • Supports all USB keyboards, mice, and HID devices such as bar code scanners and USB touch screens
  • The MegaCast™ is completely transparent to all PC's, operating systems, and programs
  • Each PC boots error free, and PC's can be powered up or down in any sequence
  • Uses inexpensive standard cables
  • A 2U height rack mount tray is available for rack mount installation

rear view USB-844-KM-BC 4 Port USB Keyboard & Mouse Multicaster / Multiplier
rear view USB-844-KM-BC 4 Port USB Keyboard & Mouse Multicaster / Multiplier


USB-844-KM-BC: MegaCast™ 4 port USB Keyboard & Mouse Multicaster. Routes the output of a single USB keyboard & mouse, or any two HID devices, such as bar code scanner, to as many as four USB PCs simultaneously. Connecting units in series gives up to 10 ports.  You will need four or more USB Type A/B cables, such as our USB-300-AB-06 cables, to connect to the PCs.

All prices are subject to change without notice.
For International Representatives click here.


Standard USB type A-B cables are used to connect the MegaCast™ to the USB ports of the PCs. You may use your cables, or ours (see Accessories ). The captive cables that are part of the USB keyboard & mouse are used to connect these device to the MegaCast™.


Dimensions for the USB-844-KM-BC MegaCast™ are 2.63 in H x 8.08 in W x 6.32 in D (6.68 cm x 20.52 cm x 16.05 cm). The housing is molded of black GE Cycolac-T, a high impact ABS material, and is internally shielded with an acrylic base nickel coating for RFI attenuation. Front and rear panels are fabricated from .062 in thick aluminium and finished with low gloss paint. Power to the USB-844-KM-BC MegaCast™ is supplied by a wall mount power supply (VIP-210) provided with the unit. FCC and CE marked. Shipping weight is less than 3 lbs per unit.

Operating Temp:
Storage Temp:

32 to 104 deg. F (0 - 40 deg. C)
-4 to 122 deg. F (-20 - 50 deg. C)
Supported Hardware:


All USB compatible PCs

USB keyboards, USB mice, all HID devices, some
gaming devices
MegaCast is a trademark of Vetra Systems Corporation Copyright© by Vetra Systems Corporation All Rights Reserved

For user instructions in PDF format.
For a copy of Adobe's Acrobat® Reader.

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 VETRA Systems Corporation
275 Marcus Blvd. Ste-J Hauppauge, NY 11788-2022 USA
Toll Free 1-800-537-9296
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