With a hook at bottom， you can thread and hang them easilyGreat to use to illuminate the inside of a paper lantern or balloonBatteries are included， turn LED on and off by twisting the baseWaterproof， blinking lightsEach light emits multicolors and changes the color automatically in secondsMini party lites illuminate floral arrangements， centerpieces， place settings， paper lanterns， balloons and more.Disposable party lights with a built-in loop for hanging.Measures 1/2-inch diameter by 1-1/4-inch length.Package Includes: 20x Waterproof Colorful Blinking Balloon LightsKind Reminder: If some lights are not bright by twisting easily the base， it may not be a quality problem， please twist with more strength. If the lights still do not work，please dismantle and install them，then try to twist them!