The Optoma HDMI to Mini HDMI + Mini HDMI to Mini HDMI Cable 1m, f/PK201/PK301 is a kit that contains two cables that add flexibility to how you can connect to your PK201 or PK301 Optoma Pico Projector. As the name says, the cables are one meter (39.37 inches) long.
The first cable has a mini HDMI connector on one end (so you can plug it into your Pico Projector) and a standard HDMI connector on the other so you can plug it into a Blu-ray or DVD player or even one of the new laptops that have standard HDMI connectors.
The second cable also has a mini HDMI connector on one end (so you can plug it into your Pico Projector) and on the other end there's also a mini HDMI connector, like many smart phones, mini digital camcorders, MP3 players and other devices also have.
So this cable kit gives you the best of both worlds. Whether the device on the other end has a standard HDMI connector or a mini HDMI connector, you can connect it to your PK201 or PK301 Pico Projector.