You'll never have to worry about your Christmas tree running out of power again. This product is ideal for the LED which powered by 2 or 3 AA batteries | A good substitute for AA batteries, Saving money, not need to pay for battery replacement any more. | The wire from the battery is very thin so it worked perfectly to go under the plastic battery compartment cover. | The wire about 12ft, convenient for indoor & outdoor use. | Please view the third image before you use, the black "battery" is for current-limiting.

Experience Optimal Cooling with Our AC to DC Adjustable Power Supply. | This power supply has an input of AC 100-240 V and an adjustable output of DC 3-12 V, with a maximum power of 24W. It is compatible with both standard 3-pin and 4-pin PWM fans and can be used for cooling components such as Xbox DVR and Playstation. | Fine-Tune Your Cooling - The multi-speed controller allows you to set the fan's speed to the optimal level of noise and airflow. | The controller is not only suitable for speed regulation but also for dimming and temperature regulation. | Please contact us If the product has any quality problems, we will provide good After-sales service