Features: 1. Multifunctional application: Can be applied to various DIY projects, models, scientific experiments, decorations, artworks, etc., providing unlimited creative possibilities. 2. Two voltage options: 1.5V and 3.8V options can meet more power needs, and the most suitable voltage can be selected for different projects. 3. High brightness, low energy consumption: Small and lightweight, it can produce high-brightness light with low power consumption, making it more environmentally friendly and economical. 4. Long life: Long service life, no need for frequent replacement, more convenient. 5. Easy to use: Easy to install and use, whether you are a DIY enthusiast or a professional, you can quickly and easily realize your creative design. Specification: Material: glass+metal Size:As shown in the picture Color:As shown in the picture Voltage: 1.5V 3.8V Lamp holder: screw Package Includes:25pcs Notes: Please allow 1-2cm error due to manual measurement. Due to differences between monitors, images may not reflect the actual color of the item.