Note: The color of the product we ship is the color in the first picture, and the specification and quantity are shipped according to the quantity and specification described in the title. If you need to change the color or style, you need to contact us within 12 hours after placing the order. Our product description: Electric Circuit Kit Bulb Switch Conductive Line Kid School Educational Science Toy DIY MontessoriSpecification:Color: GreenProduct material: PlasticBattery: 2 X AA Battery (Not included)Switch Size: (L)X(W)7.1X3.2cm/2.79"X1.25"(appr.)Battery Holder Size: (L)X(W)8X2cm/3.14"X0.78"(appr.)Bulb Holder Size: (L)X(W)7.1X3.2cm/2.79"X1.25"(appr.) Product Features:Brand New and high quality.1)Assisting teachers and parents in better physics teaching2)Enrich children's leisure life, cultivate hands-on ability, and consolidate knowledge3)Let kindergarten children and elementary school students learn physical knowledge, hands-on to form a simple circuit, series circuit, parallel circuit Package included:4 X Bulb1 X Switch2 X Bulb Holder6 X Conductive Line2 X Battery Holder (Battery Not Included) Note: Because the model and display effect of the monitor may be different, there may be slight differences in color, and the size is manually measured, there may be an error of 1-2cm, please understand.