How to use this wireless MIDI adapter?

Plug the MIDI adapter "IN" into the "in" port of the MIDI keyboard, and the MIDI adapter "OUT" into the "out" port of the MIDI keyboard.
Turn on the MIDI Adapter (only powered by the built-in chargeable battery)
Make sure that the blue light is blinking before connecting any device though. Like all Bluetooth devices, only one can be connected at a time and the USB connects automatically when plugged into the computer (assuming another device wasn't connected first).

Connect MIDI Device to The Computer

No driver is required. The connection will complete automatically when you plug MIDI B into the computer and Plug MIDI A into the MIDI device. Please note that unplug the MIDI B if you don't need it in case you cannot find MIDI A's Bluetooth in the Bluetooth devices list on your app.

Automatic pairing between MIDI device and other standard Bluetooth MIDI controllers via two MIDI A adapters.

Features:

Wide Compatibility
LEKATO Wireless MIDI Adapter can connect to 5-pin MIDI DIN and USB interface connectors of standard MIDI devices, such as MIDI controller, electric piano/keyboard, synthesizer, digital mixer, MIDI keyboard, etc
Plug and Play
No need to install drivers and easy and fast pairing with MIDI devices
MIDI devices easily connect to Bluetooth MIDI devices, iPhone, iPad, Mac or Windows
Ultra-low Latency
This Wireless MIDI provides efficient and intelligent connection, the delay between two MIDI devices is only 3ms
and the interference is minimized with adaptive frequency hopping, suitable for home, studio and stage
USB MIDI Interface
The MIDI Bluetooth system comes with a USB interface, supports computer Windows system, no driver is required
one end of MIDI-B can be plugged into an adapter for power supply, and the other end is directly connected to a USB MIDI device
Get Rid of Cables
Add Bluetooth wireless MIDI to your MIDI devices and reduce cable clutter in the studio, and enjoy the freedom of the stage
Please Note
MIDI Ⓐ contains a built-in chargeable battery that has to be charged when the battery is out of power
And it cannot powered by a MIDI device. MIDI Ⓑ (powered by the PC) is a wireless MIDI system for computers. By plugging it into computer, PC can support wireless and connect MIDI Ⓐ via it

Specifications:

Brand: LEKATO
Model: M02045N
Connector Type: USB Type B
Cable Type: USB
Compatible Devices: Personal Computer
Special Feature: Data Transfer, Lightweight
Operating Band: 2.4Ghz
Latency: <3ms
Power Requirement: MIDI Ⓐ is powered by its built-in battery that has to be charged by USB cable (not powered by MIDI device). MIDI Ⓑ can be powered by PC device.
Battery Life: Up tp 12 hours
Charging Device: USB charging cable that it comes with
Net Weight: 1.13oz / 32g
Gross Weight: 2.47oz / 70g

Note:

Please refer to the measurement. Tiny measuring error is allowable in normal range
There might be a little color difference due to the monitor, camera or other factors, please refer to the physical item
This wireless MIDI adapter is Applicable to MIDI keyboards, synthesizers, and electric drum sets. Please check the interface of your MIDI device before purchase. This cable applies to 5 PIN ports, not USB-B.