This is the Futaba R614FS 2.4GHz FASST 4-Channel Receiver and is intended for use with the Futaba 4PK and 4PKS Surface Radio Systems.

Features: 

Specifications:


Size:
1.38x0.91x0.33" (35.1x23.2x8.5mm)


Weight: 0.28oz (7.8g)


Operating Voltage: 3.7V~7.4V


Usable Voltage: 3.5~8.4V