Built-in Timer: Featuring a timer function (6 hours on, then 18 hours off every 24 hours), saving you the hassle of switching them on and off daily. Lasts 2x Longer: These LED tea lights come with pre-installed batteries that last for 30 days and are easily replaceable via the tab on the bottom. Cool and Romantic: The flickering, flameless LED lights are perfect for decorations. Use them in votive holders, on dining tables, or windowsills for a romantic, cozy dinner and enjoy the risk-free flickering glow. They're also wonderful for setting the mood for Halloween, Valentine's Day, Christmas, and anniversaries. Child and Pet Friendly: These LED tea lights can be used without worrying about flames, posing absolutely no fire hazards or burning risks, making them safe for families with pets or small children. Perfect Size: Each electric tea light measures 1.57 inches in diameter and 1.37 inches in height, making them a perfect fit for most votive holders, tea light holders, and lanterns.