Is this adaptor compatible with devices that require a 5V, 4A power supply, and are there any specific devices it is recommended for?

Yes, this adaptor is compatible with devices that require a 5V, 4A power supply.

Questions & Answers: Triad Magnetics Wall Mount Adaptor, Ac-Dc, 5V, 4A - WSU050-4000-13

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Triad Magnetics Wall Mount Adaptor, Ac-Dc, 5V, 4A - WSU050-4000-13

Price For: Each No. of Outputs: 1 Output Output Power Max: 20W Output Voltage - Output 1: 5V Output Current - Output 1: 4A Output Voltage - Output 2: - Output Current - Output 2: - Output Connector: Barrel Plug Center Positive 2.1mm x 5.5mm x 11mm Output Voltage - Output 3: - Output Current - Output 3: - Power Supply Output Type: Fixed Input Voltage AC Min: 90V
Input Voltage AC Max: 264V Product Range: WSU Series Plug Type: US