The RFM119W is a high performance, highly flexible, single-chip RF Transmitter. It is based on direct synthesis of the RF frequency.
The RFM219SW is low power, high performance, standalone RF receivers. Working with the built-in sleep timer, it consumes less power.

Embedded EEPROM
FSK, GFSK (Gaussian Frequency Shift Keying) and OOK (On/Off Key) Modulation
Transmitter Output Power -10 to +13 dBm
Transmitter Two-wire Interface
Receiver Sensitivity -109 dBm at 9.6 ksps
Receiver 4-wire SPI Interface
Receiver Direct, Buffer and Packet Mode Supported
Receiver Configurable Data Handler and 32-Byte FIFO
Receiver Low-Power Consumption 5.7 mA
Low Sleep Current
Supply Voltage 1.8 V to 3.6 V
Transmitter Module Size 17.8 x 12.8 x 5 mm
Receiver Module Size 16 x 16 x 5 mm

Wireless Modules - RF Solutions