We recommend this 20W@5V, 4A high power high current power supply for you, it's a perfect power supply for the high power development board, like Jetson Nano. In addition to cost-effective, manufacturers have done multiple protections such as over-current protection and short-circuit protection to ensure that it is safe and reliable. Features High power, high current High stability, safe and reliable US-style plug FCC/CE certification DC Jack Specification Rated input voltage: 100Vac to 240Vac Output regulation: 4.75Vdc to 5.25Vdc (±5%) Output load: 0A to 4.0A Ripple and Noise: 250mVp-p Input frequency range: 47Hz to 63Hz Ambient temperature: -30℃ ~ 70℃ Relative humidity: 10% ~ 90%