Features: Brand new and high quality Achieve stable voltages output with this Adjustment Regulated Module. Perfect for electronic enthusiasts, engineers, and those who demand precises control. This module features LCD screen, button, and a double designings for easy operate and durability. Designings for those who require accurate control, this module is suitable for use in lab, schools, factory, and electronic device maintenance and debugging. Whether you need to regulate voltages in experiment/fine tune electronic device, this module provide solution for accurate control. Improve your power experience with this board. With multiple mechanisms and external fan port, this module ensures efficient performances and extended usage. Specifications: Component: electronic Style: multiple size for option Note: Please allow 1 to 3cm error due to manual measurement, please make sure you not mind before your bid, Due to the differences between different monitors, the picture may not reflect the actual colorful of the item. Package includes: Style1: 1 set ZK10022 Power Module / Style 2: 1xZK10022B Single Board / Style 3: :1xZKBT Blue teeth Module / Style 4: 1xUSB to TTLs Module