General Features  
                   ·  Frequency compensation vs temperature by software from -40°C to +85°C  
                   ·  Frequency precision after compensation: 2ppm  
                   ·  Perfect receiving sensitivity: -125dBm (test conditions: 2kbps, 433.92MHz)  
                   ·  Low power supply: 3.3V - 5.6V 
                         Low current: transmitting (18dBm) 60mA
                           receiving                    22mA
                           idle                             30uA 
                   ·  Frequency bands: 80MHz to 650MHz
                                    862MHz to 940MHz 
                        Modulation schemes: 2GFSK, 2FSK 
                        Spectral shaping: Gaussian and raised-cosine filtering 
                        Data rates supported: 0.05kbps to 25kbps 
                   ·  Outside interface: IIC  
                   ·  Working temperature: -40 °C - + 85 °C  
                   ·  Programmable output power: -10ddBm to +18dBm in 63 steps 
                        Automatic PA ramp control 
                        Receiver sensitivity: -125dBm at 1 kbps, 2 FSK 
                        Digital RSSI 
                        On-board Tx/Rx switch 
                   · On-board 10 bit temperature sensor