The Raspberry Pi Power Adapter with an on/off switch is a black Micro USB power supply designed specifically for Raspberry Pi. It has a maximum output power of 12.5W and an output current of 2.5A, providing a reliable source of power for Raspberry Pi projects. With its compact dimensions (3.75" x 2.75" x 1.25") and integrated on/off power switch on its cable, this power adapter is a convenient and essential accessory for Raspberry Pi enthusiasts. From the private collection of a radio engineer (my husband) who loved his life in radio and was a dedicated Pi enthusiast! Adapter kept in smoke-free office/studio. Thank you for looking and good luck in all your transactions.