Low power RF transmitter:

Working frequency: 433Mhz~868Mhz
Low costing, high performance and price ratio
Tuning free during production
FSK or ASK reception
PLL employed
Fast PLL lock time
High resolution PLL with 2.5KHz step
Programmable frequency deviation (from 30kHz to 240kHz, step 30kHz)
Programmable output power
High data rate (up to 115.2Kbps with FSK modulation??with ASK modulation highest data rate is 256Kbps)
Differential antenna output
Automatic antenna tuning
SPI interface
Clock and reset signal output for external MCU use
10MHz crystal for PLL referencement
Programmable Crystal load capacitor bank
Wake-up timer
Low battery detection
2.2 to 5.4V power supply
Low power consumption
Stand by current less than 0.3μA