The Mini Serenity USB Plugin Lamp comes with a prefixed LED Bulb, which is programmed to stay on once connected to a USB Port or if you have any USB adapter laying around in the house or office, you can plug these cute little lamps into the USB adapter and straight into the wall. Q&A Himalayan Salt brand has emerged as the largest supplier of Himalayan Salt Lamps in the US, boasting exclusive designs unparalleled elsewhere. Our commitment to crafting unique pieces, combined with our position as a market leader, sets us apart in the industry. With a dedication to innovation and quality, Q&A Himalayan Salt continues to redefine the ambiance of living spaces nationwide.