The CircuitWerkes GENr8 is a powerful, yet inexpensive DTMF tone encoder designed to meet your needs. This versatile encoder can produce either single DTMF tones or can record and play DTMF sequences up to 20 digits long. The GENr8's optically isolated inputs can accept contact closures from external switches, relays, or even logic devices. Using the contact closures, you can play single tones, recorded DTMF sequences or even program your GENr8. RS-232 let you control or program the GENr8 from any PC. A free Windows program makes control and programming incredibly simple, but you can also operate the GENr8 from any terminal program on almost any type of computer. When computer controlled, you can send DTMF sequences with individual spacings & durations.