It sounds like you're looking for an LG 19V-3A power adapter. These types of adapters are typically used to power laptops, monitors, or other devices that require a 19V DC output and can handle a 3A current.

Here’s what you should know about the 19V-3A specification:

• Voltage (V): 19V indicates the output voltage that the adapter will provide, typically used for many laptops, especially older LG models and other devices.
• Current (A): 3A means the adapter is capable of providing up to 3 amps of current. This is a measure of how much electrical current the adapter can supply without overheating or causing damage.
• Power (W): The power can be calculated by multiplying voltage and current: $19V \times 3A = 57W$. Therefore, this adapter is designed to supply 57 watts of power.