Our Egg Candler - Pen Sized shines a light on your chicken eggs with handy, compact design for monitoring egg development. Despite its small size, this candler delivers surprisingly bright and cool light for clear visibility inside the shell. The Egg Candler Pen Sized makes it easy to check embryo development and monitor egg fertility through simple candling techniques. This effective method illuminates the egg interior without disturbing the developing embryo, providing valuable insights for successful hatching. Features Compact, pen-sized design for easy handling Bright, cool light for clear visibility inside eggs Ideal for monitoring chicken egg fertility and development Simple and effective candling method Suitable for backyard chicken keepers and breeders Non-disturbing illumination of egg interior Essential tool for successful hatching programs Perfect for backyard chicken keepers and breeders who want to monitor egg fertility and embryo development effectively with a convenient, portable candling solution. Batteries not included - please purchase separately for operation.