You can specify up to three light string designs before placing your order. If you don't specify, we'll randomly ship three designs.Lighting Design: Beautiful window silhouette lights with warm white light create a warm holiday atmosphere. Hang the lights on your window or door to make your window or door decorations sparkle.Battery Powered: This Christmas silhouette window light requires three AAA batteries (not included). Operating time depends on battery quality. To replace the batteries, simply slide out the battery cover on the suction cup hook and align the polarity of the battery compartment.Gift Lights: The classic bell-tree-reindeer-snowflake-star pattern takes the hassle out of gift-picking. These reusable holiday lights are the perfect way to express good wishes to family, friends, relatives, or colleagues.Suction Cup Hanging: Use just the right amount of force to secure the Christmas window light to a door, glass window, or smooth ceramic wall. Use 3M stickers to secure the Christmas window light. Suction cup hooks are recommended. They can also be used for car interior decoration.Practical Application: This double-sided Christmas silhouette light can be hung on doors, porches, corridors, balconies, eaves, bedrooms, mantels, table centerpieces, Christmas trees, garlands, railings, handrails, corridors, decks, terraces, bars, pubs, cafes, restaurants, shopping malls, offices, private cars, etc.