This is an EI Iron core transformer, which is a device that transfers electric energy from one alternating-current circuit AC220V 50HZ to one Inductor to lower or reducing (stepping down) the voltage you will get a 9v AC current you will need to rectify it using full bridge rectifier to get a stable DC voltage.

Specifications:

• Product brand: Caixin
• Input voltage: AC220V 50HZ
• Output voltage: AC 9V
• Rated Power: 10W
• Appearance size: 50*45*44mm
• Structure form: single-phase transformer
• Product model: EI48*24
• Input line length: 170mm (red-red)
• Output line length: 170mm (blue-blue)
• Product weight: about 0.36GK
• Mounting hole spacing: 61mm
• Frequency characteristics: low frequency
• Iron core
• Core shape: EI type
• Cooling method: natural cooling
• Cooling way: inflatable
• Linear: two red lines are the input lines, and two blue lines are the output lines

Package Included:

1 x AC220V 50HZ to AC 9V 10W EI Type Iron core Transformer