Why eppfun Bluetooth Audio Adapter AK3046 is not recognized by Windows PC as BT device?

eppfun AK3046 Bluetooth Audio Adapter is only for audio-based Bluetooth devices, not Bluetooth devices, so Windows PC cannot recognize as BT devices, and no Bluetooth device lists. For Windows 10 PC, go to "Settings" > "System" > "Sound" to find "3-LE502".

How to operate the microphone with Bluetooth headset when using Windows / macOS / Linux computer?

For Windows 10 PC, go to [Settings]> [System]> [Sound]> [Output Device Selection] (3-LE502).Input Device Selection (3-LE502) For MacOS, select [System Preference] > [Sound] > [Output] > [YET-10] and [Input] and [3-LE502] as well.Input (3.5mm connection side): audio players such as iPhones, smartphones, iPods, and TVs with 3.5mm connections.Please use devices that can be powered by USB port, such as USB charger.Output (Bluetooth side): Bluetooth enabled earphones and speakers. *Apt-X/apt-X Low Latency connection is limited to compatible devices.If the LL HD LED is lit at the same time, it is APTX Adaptive Audio Decoding.

Due to the nature of Bluetooth communication, the delay time may vary depending on the speed of the connected device.

SBC: Standard codec.Sound quality changes. With delay (170-270 ms when connected with SBCaptX-Adaptive:Almost CD sound qualityLow delay (60-70ms when connected with aptX -Adaptive)aptX: Low delay (60-80ms when connected with aptX) aptX LL: Extremely low delay (40-50 ms when connected with aptX LL)aptX HD: High resolution equivalent to high sound quality (80-100ms when connected with aptX-HD).

Some Bluetooth devices actively search for pairing and forcing ak3046 to end from pairing mode. In order to avoid this issue, please temporarily turn off Bluetooth on PC, PS4/5, or switch dock.Note: This is Bluetooth 5.2 high quality, aptX low latency and aptXHD dual mode USB Bluetooth AUDIO transmitter.Support audio devices only, not for use with keyboard, mouse device, car, game controller, or data transfer.The environment is unstable.When using Bluetooth connection, please do not use it around wireless LAN and other radio devices, around radio waves such as microwave ovens, places with high obstacles, or other environments with poor radio conditions.It can produce noise, sound delay, and transmission speed is extremely decreased and error.Earphones are occupied by other bluetooth devices and your earbuds do not remove the information of the previous connected device when connecting with new devices.Devices with two connection records are at the same time.

Precautions for Use:

This product does not have a volume control button, so please adjust the volume by connecting device.Do not turn the volume up too much at first.When the maximum volume is enough, it may suddenly make loud sounds and damage your hearing.This product does not have a built-in battery.Be sure to remove the power from the USB port before using.Make sure the power is off after use.Or disconnect the connection.It consumes power when connected, even if music is not playing.Note: If you connect PC/TV PS4 PS5 with a 3.5mm Aux cable, please connect the USB adapter to the USB side to prevent common round interference.The USB side can be directly connected to a PC PS4 PS5, but it cannot connect to a TV.