The TDM2 is a very simple 433MHz band radio data modem. It provides a medium ranged half duplex, transparent data link between a pair of 9600 baud RS232 ports without any additional interface circuitry
RDL2 is a half-duplex multi channel wideband FM transceiver in a BiM series footprint and operates on 433.05-434.79MHz European SRD band. This makes the RDL2 ideally suited to those low power applications where low cost multi-channel operation is required.
UHF Multi Channel Transparent Data Link Transceiver
The TDL2A is a 9600baud half-duplex multi channel OEM radio modem in BiM2 footprint, operating on European 433MHz ISM band. TLD2A acts as a transparent serial cable to attached host. TDL2A is an intermediate level OEM radio modem.