This is a LED light egg tester, made of high quality ABS material, insulating, stable and durable. It can be directly charged by USB, also equipped with a battery box, requiring 3AA battery. Battery power supply, can be selected according to use needs, very convenient. Suitable for hatching eggs, but also for children and students to learn the experimental incubation process.Features:Made of high quality ABS, insulating, stable and durable.LED lamp head, high power, strong light source, can clearly detect egg hatching.Using high-quality materials, safe and durable, with buttons that are easy to open and close.Suitable for hatching eggs, but also for children and students to learn the experimental incubation process.Upgrade type: Two charging methods, can be directly charged by USB, also equipped with battery box, requires 3AA battery, battery box power supply, can be selected according to use needs, very convenient.Specification:Condition: Brand NewMaterial: ABSThe color blackInput voltage: 100-240VOutput voltage: DC 4.5VBattery: 3 x AA (not included)Size: approx. 15 x 3.5 x 3.5cm / 5.9 x 1.4 x 1.4inchPackage list:1 * LED Light Egg Tester1 * Battery Box (Battery not included)1 * USB cable2 * egg chuckNoticed:Please allow 1-2cm error due to manual measurement and make sure you do not mind before ordering.Please understand that colors may exist chromatic aberration as the different placement of pictures.