CC1101 Modules
CC1101 Module, +12dBm, N503AS
Model: N503AS
Modulation: FSK
Frequency: 433M, 868M, 915 MHz
Output Power: +12 dBm
Port: SPI
Package: SMD
Brand: Coral RF
Size: 17x16x3mm
Price: $3.50
N503 modules based TI  CC1101. 868M / 915MHz used.