Is the can size 12mm x12mm x25mm mmm
Low ESR Capacitor
It's been proven that adding a capacitor to your quad's power system to the can drastically reduce electrical noise and improve performance. That's science - not hype! Try adding capacitor yourself! These capacitors are original Panasonic components that have been Low ESR rated, which makes them optimal for the delicate electronics we use in our FPV systems.
You can add the capacitor across the battery voltage (mind the polarity, or you'll be surprised with a loud POP). If you're running a high power system, it's advised to put a capacitor directly on the ESC.