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 box power supply, can be selected according to the needs of use, very convenient. Suitable for hatching eggs, but also for children and students to learn the process of experimental incubation. Features: Made of high quality ABS material, insulating, stable and durable. LED lamp head, high power, strong light source, can clearly detect the hatching of eggs. 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 process of experimental incubation. Two power supply methods: one is plug-in use instead of charging, and the other is to use 3 AA batteries. Choose the power supply method according to your needs. Specification: Condition: Brand new Material: ABS Color: Black Input voltage: 100-240V Output voltage: DC 4.5V Battery: 3 x AA(Not included) Size: Approx. 15 x 3.5 x 3.5cm/ 5.9 x 1.4 x 1.4in Package list: 1 * LED Light Egg Tester 1 * Battery Box(Not included battery) 1 * USB Cable 2 * Egg Chuck Note: 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.