Features: 3.1A synchronous boost conversion output; 3A battery terminals synchronization switches charging. Supports charging while discharging, boost efficiency up to 93%. Equipped with 4pcs LED indicator power display, automatically detect phone insertion and removal. Double clicks the button to close the output, and clicks to open the output, Type-C supports single port input and output. Mobile phones charging current intelligent recognition DCP, intelligent load identification,automatic standby;output overcurrent, overvoltage and short circuit protections; input overvoltage, overcharge, overdischarge and overcurrent discharge protections. Specifications: Material: Printed Circuit Board Type: Single Type-C Port, Type-C + USB Port(optional) Size: Mixed Size Working Temperature: standard Output Voltages: 5V to 4.2V Voltages Drop: standard Package Includes: 1x Power Bank Motherboards note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.