Q: I have 4 PCs in one room, and I want to use these 4 PCs in 4 different places (different floors in one building)

1.You can use our 4x8 HDMI matrix extender, it has 4 outputs, every output has one UTP extension output, you can chose different extension on different floors and with KVM function.

2.Yes, we have 4x8 HDMI matrix w/ KVM extender, you can chose different extender with different distance, More details I will send Email to you.

3.I will recommend you the 4x8 HDMI matrix (HME040810H), The receiver will help you connect the keyboard + mouse and any USB 2.0 devices.

4.You can use our 4x8 HDMI matrix KVM extender, it can transfer up to 100 meters

5.Yes, HDMI matrix 4x8 have 4 UTP outputs, so you can use HDMI extender to receive the video from input sources in different places

6. Yes, our 4x8 HDMI matrix extender have 4 local output and 4 extender, (Including 60 m KVM extender, and 100m KVM extender).

7.Yes, we have 4x4 HDMI KVM matrix (HME040410H) which support 4 input sources and 4 UTP extension outputs, just connect your PCs to the KVM matrix, and with 4 UTP cables connect to 4 receivers in 4 places and you can use either one of the 4 PCs anywhere.