Features: ♥ Adjustable Brightness, high and low. ♥ Touching switch. ♥ Customized for lack energy people, the happy light is safe and provide relief from the symptoms of feel low, listless and fatigued. ♥ The light is intended to boost people’s energy levels, to adjust circadian rhythms and make people feel more awake. It can help improve your mood and reset your circadian rhythm to improve sleep quality. Also it is a LED Lighting. ♥ Use 30 to 60 minutes a day to help boost your mood, increase concentration and restore energy. ♥ Natural light therapy can be used to prevent winter depression and eliminate bad mood. Specification: - Name:Happy light - Material: ABS (Acrylonitrile Butadiene Styrene) + Optical grade light guide lens - Color:White - Size：about 144X140X10MM - Lamp bead color temperature:6000-6500K - Voltage: DC 5V, 1A - Power: 5W - Scope of Application: sunlight, improve mood and increase energy - Ultraviolet radiation: No Note: 1. When shifting gears, you need to touch the whole of screen switch position with your thumb and wait patiently. 2. Do not touch the product, power cord with wet hands or wet hands. 3. Do not expose this product to corrosive substances in direct sunlight, high temperatures, humidity, dust or moisture. Package Included: 1 x SAD LED Light 1 x Stand Holder 1 x USB Cable 1 x English User Manual