Decode various audio formats like MP3, WAV, WMA, APE, and FLAC for a diverse music experience. Enjoy fast-forward, rewind, and folder switching functions for seamless music navigation. Pair your computer with BT-enabled headphones or speakers using the Audio Transmitter for quick and stable wireless connections. Experience hassle-free listening with seamless Bluetooth-compatible technology. The USB computer volume controller features a 360-degree knob for accurate volume adjustments. Enjoy one-touch mute functionality to easily manage your computer's audio output with precision. Simply insert your headphones into the 3.5mm jack of the external sound card adapter for instant sound access without complex setups. Say goodbye to searching under desks for headphone jacks. Seamlessly integrate the adapter into your setup with the USB cable feature. Enjoy easy connectivity without the need for intricate installation processes. Item Name: Volume Control Knob Material: Plastic BT Version: BT V5.1+BR+EDR+BLE BT Protocol: A2DP, AVCTP, AVDTP, AVCP, HFP, SPP, AT, GAP, GATT, RFCOMM, SDP USB Flash Drive Input: FAT32 Up to 32GB Music Formats: MP3, WMA, APE, FLAC, AAC, MP4, M4A, WAV, AIF, AIFC Signal-to-noise Ratio: 90 DB Headphone Jack: 3.5mm Audio Jack Features: Mini Size, Portable, Easy to Use Size Details: 0.94cm x 0.63cm x 0.16cm/0.37" x 0.25" x 0.06" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Volume Control Knob 1 x USB Cable