AS-102 is up to 38 percent more efficient than 2.0 or any other normal charger in the market QUICK CHARGE 3.0 Fast charging technology is a really helpful feature for the heavy mobile user. Our AS-102 series Fast Charger is able to increase charging times over conventional chargers with Quick Charge 3.0, up from the 40% speed increase. Also charges non–Quick Charge devices at up to 2.4A. Also, this adapter has backwards-compatibility with all versions of Qualcomm Quick Charge technology (1.0, 2.0) SAFETY FIRST Built in software under voltage and over voltage protection, Short Circuit Protection, Over-current Protection, AC Out Short Circuit Protection, AC Out Over-current Protection, Over temperature protection, keeping you and your devices safe anytime INOV (Intelligent Negotiation for Optimum Voltage) It allows for a fined tuned power output and a more optimized charging cycle. Quick Charge 3.0’s INOV communicates with the device to request any voltage between 3.2V and 20V at 200mV increments, allowing for a wider selection of voltages. INTELLIGENT CHARGING TECHNOLOGY Automatically adjust the charging current according to your device and its remaining capacity to obtain the fastest and safest charge for your device. TRAVEL FRIENDLY This travel phone wall charger compact size and international voltage compatibility (AC 110 – 240 v ) make it the ideal for travel. QUALITY ASSURANCE We provide 4-Month Warranty; If you have any questions please contact our customer service anytime.