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Product Overview: The Anker 521 Nano Pro is a compact dual-port USB-C charger that allows simultaneous charging of two devices with advanced safety features. Key Features: ‣ Simultaneous Charging: Dual USB-C ports enable charging of two devices at once, with a maximum output of 40W. ‣ ActiveShield Safety System: Incorporates a dynamic temperature sensor and power tuner chip to monitor temperature and adjust power output, ensuring safe charging. ‣ Compact Design: Ultra-compact form factor makes it easy to carry and ideal for travel. Technical Specifications: ‣ Total Output: 40W ‣ USB-C Port 1: Up to 20W ‣ USB-C Port 2: Up to 20W