Sun jars are solar powered lights in a frosted glass mason jar with watertight seal. Switches on automatically in the dark. 1x Rechargeable 700 mAh NI-MH battery included. Open the jar, switch to ‘charge’ & leave in direct sunlight. Once charged, your festive light will illuminate for up to 5 hours as soon as it gets dark. These on trend colored jam jars add sparkle to your backyard, porch, gazebo, garden or patio. A durable & eco friendly lantern that can withstand seasonal change.