RCS-295CTR1/2 is the model # for our single and two button 295MHz Wiegand transmitter. This transmitter will work with existing receivers in the field as well as our own model RCS-295R receiver. The existing receivers that this transmitter will work with are any Sentex ClikCard receivers. - Also available on packs of (10) Note: Contact us if there is a particular device not pictured that you are interested in purchasing, and we may be able to special order it for you.