Work frequency:420-440mhz FSK Wireless Embedded Receiver Module SPI interface Modulation:FSK ... temperature:: -40C degree--+85C degreeApplications:wireless data communication ,remote control,Keyless entry,home automation,wireless toy. Etc. Pin No. ... antenna, or to connect with external antenna via IPX cable.2GNDGND3VDDPower supply4SPISDigital input, mode selection: 0: Fixed frequency ...