This is the Spektrum voltage protector capacitor. In order to make sure your Spektrum receiver always has the correct voltage, you can use this power capacitor to smooth out the voltage to the receiver. This will help avoid spikes in the receiver battery voltage due to your servos needing large pulses of current.
You may also be interested in the following product(s)
Regular Price: $49.99
Special Price $39.99
- voltage protector Review by bobby black