Stontronics 18w plug amp go range level 6 efficiency stontronics t5877st the stontronics t5877st is a 5v dc 3a 18w plug and go switch mode power supply unit this level vi plug and go psu is a high quality highly reliable plug and go power supply suitable for a wide range of applications all over the world as standard this world traveller power supply comes with a 3 pack of the most common mains plugs including the usa uk and euro mains heads this plug unit is an ideal companion for