Yes it does as any good HDMI cable will.
Anynet vs. Anynet+
Newer models of this system, called Anynet+™, are generally of better quality and have more features than older models. In addition, the updated connecting cables transport higher-quality audio and video than the old ones. The original Anynet®, made in 2005 and 2006, was designed to work with only a television and two connected devices, and it used audio-visual, optical and communication cables to connect the two peripheral devices. The newer, more advanced system works with up to 12 different devices, and it uses HDMI-CEC (High-Definition Multimedia Interface-Consumer Electronics Control) cables to connect the devices to the TV. Anynet+™ devices do not connect to devices equipped with the original, non-HDMI-based system.
"In wall" rated? These cables carry very low level voltage (5v) and currents (.05a) per the HDMI standard hosted on Wikipedia.com. These are digital signals, and don't carry any power to speak of, so ANY one of the HDMI cables should be fine inside a wall. Signals in these cables won't start a fire. However, if your house is already on fire, these cables will burn easily... the cable itself doesn't seem fire retardant. That means if you have a fire, any cable whether in the wall or not could give off toxic gas as it burns. But that is true if it is in the wall or lying along the wall inside your room. So don't waste a lot of money on a home installation, in my opinion, as the cable will not be a problem source.
I am not aware of any warranty. I know that if you do discover any issue early on Amazon will take care of it quickly. I've read a couple reviews where the Cheetah customer service was pretty good so maybe directly ask them. Other than that not too sure about the warranty. But I haven't run into any issues myself and I have bought a couple of these cables for myself and for other people and no complaints from them either.
Unfortunately, you cannot use the angle to connect two cables. The angle has male and female connections. In the picture, the top of the angle (female) is where the cable is inserted and bottom gold end (male) is used to connect to TV HDMI or laptop/desktop HDMI. I use mine connected to the TV HDMI because the cable hangs straight down, which allows me to push the TV closer to the wall. Hope this helps.