IP67 waterproof and auto-function Passed IP67 waterproof rustproof test, get them in your yard and no need to take inside when rainy days come(Using aluminum layer, not easy to rust). Mason jar lantern charges during daytime and automatically enters motion detection mode, turns on at night. No complicated work, just slide the switch to "on" and set them under sunlight. 8 Packs 20 LED Mason Jar Lights Upgraded Version Rust resistant layer, more durable.Larger solar panel, more efficient charging makes it work steadier. 20 LED bulbs, twice brighter than 10 bulbs old version. If you decide to have it as an illuminator not just a decoration, this one is a better choice. Reinforced waterproof design, durable in rough weather. Warm Notice Charging Time: full recharge need 6 hoursWorking time: 8 hours when the battery fully charged Lid Diameter Size: 2.76 inch(70mm)/Insert 2.17 inch(55mm)If you receive the lid lights and find it is not bright, please put the lids under the sun for charging at first. Specification LED: 20 bulbs Quantity: 8 lids 8 hangers Voltage: 1.5 volts Color: warm white/cool white Material: aluminum, copper, plastic Battery: 1*AAA