These are pre-built 433MHz wireless transmitter / receiver modules. They feature ASK encoding, and perform very well. They are ideal for devices using short data bursts such as remote controls, trigger pulses etc.

Specifications:
Output power: 3dBm.
Supply voltage: 5V
Supply current: 10mA max.
Data rate: 300bps to 10kbps.

Transmitter Module: ZW-3100
Receiver Module: ZW-3102