This mask is a great and affordable option for light therapy. Please note this requires a USB plug in. Cord is included. I used a USB wall adapter with this. One thing about this mask, it does not have an on and off switch. If it is plugged in it is on. There is a button on the side that changes the light color. 💐BUY ONE GET ONE FREE💐 create a bundle and send an offer for all items listed BOGO! 🎀If it is listed it is available 🌸No Holds 🌻Authentic ☀️Smoke-Free Home 🎀MAJOR BUNDLE DISCOUNTS🎀 ☀️use code WESTERNREN for $5 off your! FIRST purchase when you sign up at Poshmark!!