Check the listing for details. 4IN1 Bluetooth 5.4 Receiver & Transmitter Wireless 3.5mm Aux Audio Adapter. Color: Black, Condition: New. Listed at 13.29 USD. Features:1. Upgrade the Bluetooth V5.4 chip.2. Supports Bluetooth reception/Bluetooth transmission.3. Automatically reconnect paired Bluetooth devices upon startup.4.3 minutes without device connection, automatically shut down.When fully charged, the music playback time is about 6 hours.6 Bluetooth supports A2DP, AVCTP, AVDTP, AVRCP, HFP, and SPP.7. Supports Bluetooth stereo music DSP technology.8. AUX audio input/audio output.9. CVC intelligent noise reduction for clearer calls.10. Supports TF card playback and instantly becomes an MP3 player.11. LED display screen, lyrics display, battery level display.12. It can be used directly as an MP3 player by plugging in the headphones. Product Introduction:This product is an intelligent Bluetooth transceiver that supports two modes: Bluetooth reception and Bluetooth transmission. Typical use cases include transferring mobile music to home speakers, car speakers, or transferring CD players, MP3 players, computers, and other audio devices to headphones, speakers, and other scenarios; Flexible to use, low distortion, low power consumption, low latency, high fidelity, and simple and convenient stereo operation. Specifications:Product Name: Wireless AdapterProduct certification: CEProduct model: T69Built in microphone: YesBluetooth version: 5.4Connection distance: 10 metersMusic format: MP3Charging voltage: DC 5VCharging time: 30 minutesCharging interface: Type-CBattery capacity: 200mAWorking hours: RX mode: about 6H, TX mode: about 5HMemory expansion: Supports up to 32GB Micro SD card (not included)Bluetooth frequency: 2.402-2.480GHzMain features: LED screen, automatic pairing, AUX, TF card playback, MP3 player, high fidelityProduct weight: 30gProduct size: 65 * 32.2 * 18mmProduct color: blackProduct material: ABS Package List:1 * MP3 player (excluding headphones)1 * 3.5mm audio cable1 * Type-C data cable1 * User manual On Jul 2, 2024 at 23:34:08 PDT, seller added the following information: