Built-in 4600mAh rechargeable battery fully charges in 4-6 hours and can be used while charging. Runtime is up to 12-24 hours depending on brightness level. With the internal battery, you can place the lamp anywhere around the home. Suitable for a bedside table, headboard, desk, shelf, coffee table, side table, or dining table. Brightness is adjusted by a long press to match your needs. The lamp remembers the last brightness setting when it is turned off and on again. Low key and elegant color scheme fits seamlessly with any decor, without clutter or distraction. We are committed to premium quality and reliable service. If you have any questions or concerns, please contact us. We strive to provide premium products and the best possible service at all times. Use scenarios: - Bedside use for reading or ambient light before sleep. - Desk or nightstand use for late night work or study. - Dining or coffee table use for meals, gatherings, or casual lighting anywhere you need a portable lamp.