The Philips HF3422 goLite Blu Cord model Energy Light is designed to boost your mood and energy with proven bluewave light technology. The light is eye-safe and 100% free of UV and near-UV light. Use anywhere, at home or on the go. There are 3 light intensity settings with even light distribution for ultimate eye comfort. Research shows 70% of users felt their energy levels improve after 2 weeks of use. Automatic universal voltage (100-240V). 2 year manufacturer's warranty.