Πρίζας / Compact: Small stabilizers that plug directly into the wall, ideal for protecting a single device (e.g. a refrigerator or a television) without taking up space.
Επιτραπέζιος / Δαπέδου (Tower): Larger tower-shaped devices that are placed on the floor or on a desk. They have more sockets and higher power (Watt) to protect multiple devices at the same time (e.g. an entire computer system or living room).
Relay: It corrects voltage very quickly by switching "steps" with electronic switches (relays). It is economical and lightweight, but the adjustment is done in steps (makes a "click"); ideal for simple household appliances (refrigerators, televisions).
Servo: It corrects voltage with absolute precision and smoothness using a small electric motor. It is more expensive and heavier, but ideal for sensitive electronics, audio, and medical equipment that require stability.