The color of the light will change with the rhythm of the music. Perfect bedside table lamp for bedrooms, living rooms, and hallways, modern offices,etc. Build in rechargeable battery with 2600mAh which can last 2-3 weeks in standby. Play time is about 5-6 hours with max volume, will be more longer under the normal volume. If only use for night light, the battery will last 1 weeks.