4000K color temperature,Read and write color temperature just right ✔The Energy Star Certification Specification for Lamps and lanterns issued by the US DOE stipulates that the correlated color temperature of all indoor lamps should not exceed 4000k. ✔Reading and writing color temperature that meets the certification specifications, the light is not the brighter the better, the suitable one is good, take care of our eyesCan Store Electricity Table lamps can use a variety of power supply methods. With a USB port, it can be charged with a plug, computer, or mobile power supply (input voltage=5V1A). Built-in large-capacity 1200 mAh lithium battery Don’t worry about running out of power.Product parameter Material: ABS Charging voltage: 5V1A Rated power: 1.5W Light source type: LED Battery capacity: 1200mAh Unit weight: about 225g package includes: LED desk lamp × 1 USB cable × 1Our promise: To provide better products and meet more needs is the goal we always pursue. We support the durability of our products. If there is any problem with our indoor string light, please contact us directly. We will RETURN or REFUND unconditionally, we will not let you bear any loss because of the product quality problem.