USB Volume Control Knob

• –A. Sound control: Red ON, the button adjusts the volume of the computer, one-button mute, the song switches up and down;
• –B. 3.5mm audio output: Blue ON, the wire-controlled earphone is inserted into the AUX OUT hole, and the earphone outputs computer voice. ;
• –Compatible system: compatible for Win XP 7 8 10, compatible for ios operating system.
• –Plug and play, no driver required.
• –Music format: MP3, APE, FLAC, AAC, MP4, M4A, WAV, AIF, AIFC

Feature:
C. Bluetooth-compatible transmission: When the green is ON, press and hold the MODE button to enter the Bluetooth-compatible search, the green indicator light flashes quickly, it can automatically match, Bluetooth-compatible earphones / speakers and other devices, the green light is stable after pairing is successful.

Description:
Product Name: Adapter
Bluetooth-compatible version: Bluetooth-compatible 5.1;
Bluetooth-compatible protocol: A2dpavctpavttpavrcphfpsppsmpatt-gapgattrfcommsdpl2Cap;
Music format: MP3, APE, FLAC, AAC, MP4, M4A, WAV, AIF, AIFC;
Signal-to-noise ratio: ≥90dB;
Bluetooth-compatible transmitter: 1. Press the mode button to turn on the Bluetooth-compatible transmission mode, and the green indicator light flashes slowly (connected). The last successfully paired Bluetooth-compatible headset/speaker will automatically reconnect. 2. For new Bluetooth-compatible earphones, press the 3s mode button, the green indicator light will flash quickly. To enter Bluetooth-compatible search mode, automatically find and connect new Bluetooth-compatible headphones/speakers. If it is not the correct Bluetooth-compatible headset, keep pressing the "Mode" button to find and pair the next Bluetooth-compatible headset. 3. Press and hold the mode key to go from (A) to (B), (B) to (C), (C) to (D). If you need to reconnect the Bluetooth-compatible headset (A), disconnect and connect the USB cable;
Green light blinking slowly: Reconnect (automatically connects to the latest Bluetooth-compatible headphones/speakers);
Fast green light: Bluetooth-compatible search in progress (search for and connect new Bluetooth-compatible devices);
Green light stays on: it's successfully connected and paired. (wait 10 seconds for sound transmission)
Bluetooth-compatible switching: Long press the mode button to automatically search and connect to the next Bluetooth-compatible device;
Notes: Different Bluetooth-compatible headsets/speakers use different schedules and protocols to search for a connection, and the timing will vary. If the search fails, please turn on "Bluetooth-compatible" to verify. Turn on the Bluetooth-compatible headset, unplug the USB cable and reconnect;
Packing list:
1 x Bluetooth-compatible adapter
1 x USB cable
1 x instruction manual
1 x packing box
Note:
1. Due to manual measurement, please allow 1-3cm error. Make sure you don't mind before bidding.
2. Due to the difference of different monitors, the picture may not reflect the actual color of the product. Thanks.