The type-C connector is host and the micro usb 2.0 connector is target. it can't charge the type-c phone/tablet/laptop if you connect the micro usb 2.0 to power. Type C connector is the new design for USB 3.1
New smaller size: similar to size of USB 2.0 Micro-B Reversible Design for Type C connector Reversible plug orientation Cable direction Support Scalable power charging for Tablet Mobile Phone Hard Disk Drive