Radiometrix has a wireless application board which provides 8-channel digital input/output implementations of remote control functions.

It can be used for wireless designs in the UHF, VHF and FM bands.
 
The design kit includes two CTA88-000-DIL chips, a CTA88 encoder board, a CTA88 decoder board, quarter-wavelength monopole or helical antennas, four jumpers for mode configuration, DIP switches for address and frequency channel configuration, 8 opto-isolated digital inputs, and 8 relay outputs.
 
The CTA88 is an 8-bit address encoder/decoder for use with licence-exempt ISM/SRD band radio modules.

It permits the setting up of a one-way wireless link for remote control applications. 

The board has dimensions of 115x86x20mm.