RB Series Response Pads

Feature	Benefits
USB interface	Compatible with Windows and Mac OS. Linux drivers are also available though unsupported.
Replaceable key tops	Customize the response pads to any experiment (more below).
Built-in reaction time measurement	Get piece of mind with a hardware timer that guarantees 1 millisecond resolution. Your computer is now free to perform any task, however complex (e.g. playing a movie) while the response pad takes care of timing (more below).
Universal compatibility	The RB Series response pads are compatible with E-Prime, Presentation, SuperLab, and other programs.
No batteries or A/C adapter required	Take them anywhere, they work even on a battery-operated laptop.
Accessory Connector	You now have six general purpose TTL lines -- save on the cost of an I/O card (SuperLab 4.0 will be needed to take advantage of this feature).
Upgradeable firmware	Your response pad will never be obsolete. The firmware (the software inside the pad) can be upgraded via a simple download.

With the RB-x30 models, Cedrus introduces removable key tops on all models. The tops can be removed without any tool. Every model includes red, green, blue, yellow, and clear tops.

This feature gives you, the investigator, new ways to customize the response pad for your particular experiment. Examples include using all four colored tops in a Stroop experiment, or use the red and green tops to simplify instructions to participants, e.g. "press the green key if the two faces are the same or red if they are not".

You can even display your instructions, literally, on the response pad. Using your printer, you can print any text or graphic, on plain white or colored paper, and insert it under a clear top.

The top of every key on every RB model can be removed and replaced except for the round button on the RB-530.

The RB-x30 response pads are XID devices, or eXperimental Interface Devices. This technology was originally developed for the high end Lumina fMRI response pads but is now included in the RB Series pads as well.

Being an XID device means that your response pad can measure the participant's reaction in hardware and then report a time stamped response to the computer. This capability relieves the computer to provide computationally intensive trials such as movies without worrying about maintaining accurate timing.

XID devices provide timing and other facilities, e.g. a long-cycle timer that can be polled at anytime by the computer, test procedures for measuring transmission delays due to the computer's operating system, support for an Accessory Connector, and so forth.