This is the 2.4GHz FASST R614FS 4-Channel Receiver used with the
Futaba 4PKS Surface Radio System from Futaba.
FEATURES: Normal and high-speed modes for analog or digital servos including
the BLS series
INCLUDES: 2.4GHz FASST R614FS 4-Channel Receiver with Instruction Manual
SPECS: Size: 1.38 x 0.91 x 0.33" (35.1 x 23.2 x 8.5mm)
Weight: 0.28oz (7.8g)
Operating Voltage: 3.5 - 8.4V
Current Drain: 135mA or less