Charming during the day and mesmerizing at night, this all-weather, color-changing Tree of Life solar mobile is crafted from durable plastic and automatically illuminates at dusk. Acrylic round tree icons cascade down from the silver plastic topper, which houses the solar panel. For best results, the design should receive direct sunlight each day for around 8 hours. The piece requires 1 rechargeable AA battery, which is included. The topper features an attached cord for hanging from a shepherd's hook (sold separately) or tree branch. To use, turn the on/off switch to the on position before charging in the direct sunlight. To extend battery life, turn to the off position when not in use. If your mobile doesn't turn on at night, it may be caused by one of the following issues: The switch is in the off position. Push the switch to the on position and allow the solar light to be charged for at least 8 hours in direct sunlight. Make sure the solar panel is in an area where it receives the maximum amount of direct sunlight every day. If the solar light is located too close to other light sources (porch lantern, street light, etc.), it needs to be relocated to a place away from an external light source. Battery Replacement: Use a screwdriver to remove the screws from the back of the battery box (underneath the plastic topper by the on/off switch). Remove used battery and replace with a new one of identical specification.