The AT86RF211 (aka: TRX01) is a single chip transceiver dedicated to low power wireless applications, optimized for licence-free ISM band operations from 400 MHz to 950 MHz. Its flexibility and unique level of integration make it a natural choice for any system related to telemetry, remote controls, alarms, radio modems, Automatic Meter Reading, hand held terminals, high-tech toys, etc. The AT86RF211 makes bidirectional communications affordable for applications such as secured transmissions with hand-shake procedures, new features and services, etc. The AT86RF211 can easily be configured to provide the optimal solution for the user's application: choice of external filters vs. technical requirements (bandwidth, selectivity, immunity, range, etc), and software protocol (single channel, multiple channel, FHSS). The AT86RF211 is also well adapted to battery operated systems, as it can be powered with only 2.4V. It also offers a "Wake Up" receiver feature to save power by alerting the associated microcontroller only when a valid inquiry is detected.