Build-in the PD Emulator Trigger at Type-C female end. input: Type-C female, 65W or 87W Type-C Charger and support 15v output. output: Microsoft Surface Laptop male, DC 15v Use it with 65W or 87W Type-C Charger and support 15v output to conveniently charge your Laptop with DC 15v port. Please note the Type-C charger power must support 15v output. Otherwise it doesn't work.