TIMER & TEMPERATURE CONTROL: heated eye mask for dry eyes is powered by USB, with 5 levels of temperature adjustment (104-140) and 5 level timing settings (20min-60min). The warm compress pad for the eyes can relax your eyes with consistent heat for as long as you need HEAT TREATMENT: The heating eye mask can completely warm your eyes, maintaining enough heat and moisture to effectively deep relieves dry eyes, puffiness, blepharitis, dark circles, eye fatigue, and eyestrain, allowing a deep sleep SPA treatment for your eyes UPGRADE HEATING TECH: The electric heated eye mask is powered by 5V / 1-2A USB outlets, which are compatible with laptops, battery packs, and car chargers. With the upgrade heating technology and safety design, this USB eye mask can promote blood circulation and relieve the eye fatigue of dry eye BREATHABLE AND GENTLE: This eye heating pad is made of soft and comfortable fabric, which is breathable, silky, and soft. With the adjustable strap fits different face shapes and ensure the heating can warm completely around the eyes AFTER-SALES SERVICE: Our warm eye mask comes with a 5ft charging cable. It also comes with a spray bottle for eye compress moist heat and a cloth storage bag. Please if you have any issue with this product