The high-speed USB MIDI HOST box (UMH-20) is a new generation of USB MIDI host box launched by DOREMiDi. This product has a standard high-speed USB2.0, which has the characteristics of strong compatibility, fast transmission rate and high stability. The product has a firmware upgrade function and is perfectly compatible with all devices with USB MIDI interfaces.POWER IN: Product power supply interface, use USB-B plug to power the product, power supply voltage 5VDC.USB HOST: High-speed USB2.0 host interface, through the USB-A plug, connect to MIDI devices with USB MIDI device.MIDI OUT: MIDI output interface, using a standard five-pin MIDI cable, connected to the input interface of the MIDI device.MIDI IN: MIDI input interface, using a standard five-pin MIDI cable, connected to the output interface of the MIDI device.Work indicator for each interface.Update Key: Support firmware upgrade, compatibility upgrade for special MIDI devices3. Steps for usage1) Power supply: Use a 5V USB power supply to supply power to the product through the "POWER IN" USB-B port (note: this port has no data communication function).2) Connect a USB MIDI instrument: Connect a USB MIDI instrument through the USB-A interface of "USB HOST". After the connection is successful, the indicator of "USB HOST" will light up3) Connect MIDI DIN instruments: The MIDI OUT of the product is connected to the MIDI IN of the instrument, and the MIDI IN of the product is connected to the MIDI OUT of the instrument. When the MIDI interface has MIDI message output/input, the indicator light of the MIDI interface will flash.5.Product ParameterModel: UMH-20Size (L x W x H): 115*53*33mmWeight: 150gUSB HOST Communication Rate: 480Mbps(60MB/s)USB HOST Version: Standard high-speed USB MIDI HOST interface (USB2.0)USB HOST Compatibility: Compatible with all USB MIDI devices USB2.0/USB1.0/USB1.1MIDI Interface: High-performance FTP processing with one input and one output 16-channel MIDI interface, Built-in high-speed IsolatorMIDI Compatibility Compatible with all musical instruments with MIDI standard interfacePower In Interface: Powered by USB-B interface, 5VDCIndicator Light: Product power indicator, USB working indicator, MIDI output/output indicatorFirmware Upgrade: Support firmware upgrade6. Precautions1) This product contains a circuit board.2) Rain or immersion in water will cause the product to malfunction.3) Do not heat, press, or damage internal components.4) Non-professional maintenance personnel shall not disassemble the product.