Feature: 1. Input And Output: Input: AC85?265V 50/60Hz Output: current 600mA (constant); voltage 2?4VDC; can be DIY connected to a 3W lamp bead. 2. Small Size: This LED driver is small in size, easy to hide, and does not affect the overall decoration aesthetics. 3. Good Insulation Effect: Both ends of the driver"s output and input are equipped with high quality cables without flicker and good insulation. 4. Easy To Install: Easy to use Directly link the power supply and lamps without repurchasing cables, making DIY more convenient and simple. 5. Widely Used: Constant current power LED driver, can be used in most LED lights, no noise, good heat dissipation, long life. Specification: Item Type: LED Driver Size: Approx. 4x1.7x1.5cm / 1.6x0.7x0.6in Model MODEL: 1 x 3W Input Voltage: AC85-265V Frequency: 50/60HZ Output Voltage: 2-4VDC Output Current: 600mA Application: DIY Can Be Connected To A 3W Lamp Bead. Package List: 1 x LED Driver Note: Do not measure voltage under no load.