Does A Switch Need Power

does a network switch need power does switch dock need power does a poe switch need power does a reed switch need power does a ethernet switch need power does a pressure switch need power does a kvm switch need power does hdmi switch need power does poe switch need power supply how much power does a switch dock need how much power does a nintendo switch need to charge how much power does a fluid switch and pump need does a poe switch need a power supply