Adjustable-Voltage Power Supply, DC Switching Power Supply Transformer, Speed- and Voltage-Adjustable Power Supply, DC Power Supply 

This is a DC power adapter.
It is intended for DC power supply only and cannot be used to charge devices. If used to charge battery-powered devices, it will charge them but will not automatically stop once fully charged.
If you are unsure how to choose the right model, please contact customer service.
3–12 V (minimum voltage 3 V, maximum voltage 12 V)
3–24V (minimum voltage 3V, maximum voltage 24V)
Other options are the same as above
2A, 3A, and 5A refer to the adapter’s current
Weight of a single power supply: 210 grams