Ambient RC-RB / RCRB Remote Receiver (Replacement for RCM-RX receiver) Replacement for Ambient Brand RCM-RX / RMC RX receivers ONLY Only Compatible with Ambient brand remotes. NOT Compatible with Skytech, Acumen, or other brand remotes. Replacement for Ambient Brand RCM-RX / RMC RX receiver Receiver for RCT, RCM, RCMT, RCT, RCST, RCB, TLM, TLT, WWTD, and WMTD transmitters only. See Product Description for Compatibility Questions