My Comparison List

4 x 4K UHD HDMI 1xVGA, 1xDP over HDBT Transmitter with a Matrix HDMI Output, Control: Pushbutton, RS232, Auto Switching, Contact closure - Includes one SY HDBaseT 70 SLIM Receiver
£961.40 Ex VAT
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Dual High Voltage Relay Controllable From KP Series Output Ports. Provides Simultaneous or Independent Control of Common Mains Power Via 2 Relays. DIN Rail Mount.
£86.90 Ex VAT
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SY Electronics matrix switcher 8x7+1 HDMI Out ( 7x receivers included).
£4,567.20 Ex VAT
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802.11G (2.4G HZ) WiFi Adapter for Cayin devices
£62.06 Ex VAT
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Features

Controller
RS232
-
RS232 and IR
-
Manufacturer
SY Electronics
SY Electronics
SY Electronics
Cayin