buy HDMI switch Startech ST121HD20FXA2 . The Startech ST121HD20FXA2 HDMI Signal Extender is a wired HDMI switch device designed to extend high-quality audio and video transmission over fiber optic cable, supporting Ultra HD resolutions up to 4K at 60 Hz with 7.1 channel surround sound. This complete kit includes both the transmitter and receiver, enabling a point-to-point connection without the need for network setup, drivers, or software, ideal for straightforward and professional installations. Compatible with single-mode and multimode fiber optic cables, it allows HDMI signal extension up to 1 km (3300 ft) over single-mode or 300 m (1000 ft) over multimode, ensuring stable transmission free from electromagnetic interference (EMI) thanks to the immunity provided by single-fiber LC optical fiber. The device features a robust steel enclosure with built-in mounting brackets for secure and tidy installation in home, corporate, or industrial environments. It also offers multiple relevant connections, including HDMI ports, two Micro-B USB ports for power or control, and RS-232 connectivity for integration with control and automation systems, plus a 3.5 mm auxiliary audio output that allows simultaneous playback of audio transmitted via HDMI and this output, offering flexibility for various sound systems. Its functions include IR and RS-232 signal extension for remote control of devices like projectors or AV equipment, and it features advanced EDID copy technology to ensure proper display communication and compatibility during setup. LED indicators provide clear operational status monitoring, while ESD protection up to 8 kV air and 6 kV contact safeguards the equipment against electrostatic discharges, ensuring durability and reliability. It operates with a standard input voltage of 100 to 240 V AC and a working voltage of 5 V DC, with an input current of 0.35 A, and compact dimensions of 68 mm width, 134 mm depth, and 18 mm height. This device is a professional and efficient solution for HDMI signal extension in environments requiring high-quality image and sound, with advanced control features and compatibility with existing fiber optic infrastructures. Connections: Micro USB BRS-2322HDMIUSB x 2RCAHDCPHDMI 2.1 x 1Type: SwitchWiredMale Plug/SocketColour: BlackVoltage: 5 V100-240 V100 - 240 VAmperage: 1 AFrequency: 60 HzCharacteristics: Installation guide includedPorts: 2Power supply: WiredCCSpeakers: 7.1Technology: HDRNot included: Adapter ACCertificate: CE - RoHS