2.2 Farad Car Audio Capacitor, Voltage Display, Over Voltage Protection

Does the capacitor have a remote wire

No, it does not use a remote wire. It turns on/off automatically based on voltage from the system.

Why on the diagram the positive is on the left and negative on right when the capacitor the positive is on left and negative on the right????

Left/right labeling is just diagram orientation. Always follow + to battery positive, – to ground, regardless of drawing position.

how many actual farad? Says both 2.2 and only .2 which is it?

The actual capacitance of the Lanzar/Pyle LZCAP22 is 0.2 Farad

What size amp is this good for?

The LZCAP22 is typically used with a small car amplifier in the range of about 20–30 amps total system draw. It’s meant for low-current audio setups, not big high-power subs or large multi-amp systems.