Fangrui Product Details Design - This Candler Can Be Used Directly After Charging Without Plugging In Which Is Easy To Carry And Can Be Used Indoors Or Outdoors. It Gathers Light Flashlights And Cell Phones And Can Make The Hatching Process Easy And Fun. Easy To Use - For Students, Home Hatchers, And Even The New, The Egg Candler Is Easy To Use. You Can View The Eggs And Compare Them With The Picture On The Chart To Determine Their Stage. Clear To See - Gain Precise Into The Fertility And Development Of Each Egg With Our Powerful Egg Candler. The Intense Light Source Ensures A Clear View Of Delicate Veins And Movements Within The Egg, Even Allowing You To Witness Chicks Attempting To Break Through The Air Sac. Its Your Window Into The Fascinating World Of Embryonic Growth. Versatile Egg Handing - Adapt To Egg Sizes Effortlessly With Our Egg Candlers Flexible Attachments Featuring Soft Rubber Ends. Whether Youre Examining Quail, Duck, Or Chicken Eggs, The Gentle Yet Secure Grip Ensures A Snug Fit Without The Risk