The receiver is designed for one-transmitter-many-receivers system. There are two channels for each receiver. You can use 2 receivers with transmitter CV-4 orCB-4. You also can choose external antennas for them. With the extended external antennas, the transmitting distance will reach about 2000m in the open air. This kit is also a multi-mode remote control which includes four working modes, toggle, momentary, latched and momentary+toggle.