Socket: E10 micro screw base. Quantity: 10 bulbs/box. Voltage: 12V, power: 2W. Size: 26*10 mm (as shown in Figure 2). Type: Incandescent. High quality, resistant to shock and vibration. Easy to install: Replace the bulb by unscrewing the flashlight head from the light body, removing the retaining ring and the old bulb. Compatible with many power tools and used for experiments. Standard socket: E10Bulb type: incandescentSize: 26*10mm (as shown in Figure 2)Color temperature: yellowPolarity: nonePackaging list: 10 bulbs/boxNote:1. Typically AA, AAA, C and D batteries have a voltage of 1.5 volts per cell. Please make sure you get the correct voltage type. 2. Easy to install, plug and play, can be used indoors and outdoors. Light weight. 3. High quality, each bulb will be inspected before leaving the factory, please feel free to buy.