What are the dimensions and weight of the Black Box KVXLCHDPF-200 KVM Extender?

The dimensions are 1.71 inches high, 7.09 inches wide, and 3.27 inches deep, and it weighs 0.85 pounds (0.386 kg) without the SFP.

What is the maximum video resolution supported by the Black Box KVXLCHDPF-200 KVM Extender?

The maximum video resolution supported is 4K @ 30 Hz, which is 3840 x 2160 at 30 Hz.

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Black Box KVX Series KVXLCHDPF-200 KVM Extender over Fiber - 4K, Dual-Head, HDMI/DisplayPort, USB 2.0, Serial, Audio, Local Video

DisplayPort or HDMI dual-head 4K transmission up to 30 km over singlemode cable
Supports DisplayPort and HDMI video up to 3840 x 2160 at 30 Hz
Transparent USB 2.0 extension supports HID devices, mass storage devices.
Bidirectional audio via speaker/mic connection
Supports RS-232 peripheral (serial) devices such as scanners or terminals.
Local and remote units connect at distances of up to 10 km using SFP <1250 Mbps
Supports dual 4K view video source transmission (one PC with two video output ports)
Local video port loopback for monitoring on transmitter (TX) unit