sps This is a bi-directional HDMI (meaning the inputs can be used as outputs and the output as an input respectively) switch. It is powered over the connected HDMI devices. It is NOT a splitter! So, if the question is about the possibility to connect a device using a USB to HDMI adapter cable using the HDMI end (connector) with the device connected on the USB end (connector), then the answer is YES.

sps Yes, it does support Gigabit LAN.

sps Yes, it works.

sps Well, it depends on the software implemented in the car's player. If there is the possibility to play audio files from a connected USB stick then it is very probable to use the M135 as BT receiver (making sure the stick is switched as receiver with the BLUE light blinking) to stream audio from phone or other BT capable device. If the M135 is recognized there would be a female voice announcing that it is connected or disconnected from the speakers of the car stereo and there will be "BT AUDIO" indication on the car stereo's display. I have tried it with my old SONY CD-Radio-USB player and it worked like charm.

sps Use a transformer rated at 250 VA and with 2x24 V AC secondary windings. The maximum RMS power would be 2x100 Wrms for 4Ω speakers, 2x75 for 6Ω speakers, 2x50 Wrms for 8Ω speakers and 2x25 Wrms for 16Ω speakers. Keep in mind that these are the maximum theoretically possible power output values using the right sized power transformer (250 VA - 2x24 V AC) and the THD values are at their maximum and audible! levels.

sps There are two LED lights, the white one is simply a torch while the red laser serves as a pointer, although it is not accurate with respect to the field of view.

sps Aluminum alloy.

sps You can listen to the TV's sound over BT headphones with a minimum of delay if your headphones support the LL-aptx (Low Latency aptx) codec. when you use the Blitzwolf® BW-BR5 as an Audio Transmitter connected to your TV set (using the optical or the 3.5 mm line-in input).Similarly, you can use the Blitzwolf® BW-BR5 as an Audio Receiver and connect your wired headphones using 3.5mm line-out output. Here too, the BT emission has to support Low Latency aptx codec in order to have minimum delay.If neither the TV set, nor the headphones are BT enabled you can use a pair of Blitzwolf® BW-BR5, using the one connected to TV set as transmitter and the other one as a receiver connected to your wired headphones, establishing a low latency wireless BT link.