RF04 - USB Radio Telemetry Module 
RF04 Specification
Power Requirement - Powered entirely from USB port 
Over Air Data Rate - 19200 bps.
Default Frequency - RF04-400 433.92MHz
- RF04-900 869.85MHz 
Range - Up to 250m line of site, Up to 150m for RF04/900
Data Buffer - Internal 128 byte buffer

RF04 Technical Data

Enquiry

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USB Modem RF04
Description
The RF04 is a very easy to use radio telemetry module. The module is powered from the USB bus, so no external power supply or batteries are required. Just plug it into your PC and it will appear as a COM port. The RF04 module can be used by anyone who can program a PC to use the COM ports.