The two devices above are the same thing, just different colour cases. They both use the same chip. I have been using one of the black ones for over six months with no problems. However as mentioned elsewhere they both take more current from the HDMI port than it is designed to give so there is a small risk involved in using them.
Unpowered adapters may burn out diode D1, or your D1 may be strong enough to handle the power required by the adapter. Or D1 may fail by shorting out, in which case it will seem to work but may cause problems later if you hook up to another HDMI device.