2-year maintenance support for this cordless lamp. If you have questions, please contact the seller via your Amazon order page: open the order, select the seller, and send a message. Rechargeable battery powered table lamp. Built-in 6000 mAh battery provides 12 to 42 hours of light depending on mode. USB C charging fully charges in about 6 hours, and the lamp can be used while charging. 3 way color temperature and stepless dimming. Choose from 2700K warm white, 4000K neutral, or 6500K white. Stepless brightness adjustment with a touch switch, and a long press to dim for precise control. IP65 weatherproof. The lamp has a waterproof layer treatment and is not afraid of rain erosion, maintaining a timeless, durable appearance. Use scenarios. Ideal as a portable desk lamp for study or work, a bedside reading light, or a weatherproof outdoor lamp for patio, balcony, camping, or emergencies.