Wireless Bluetooth 5.0 Adapter 3.5 Mm Aux Stereo Audio Receiver U Disk Play Description: Bluetooth 50: Adopted Bluetooth 50 technology, with steady pairing, fast transmission and wide signal range (33 feet) Dual Device: With a 3.5mm AUX port and 2 RCA ports, it allows you to connect to them simultaneously to connect to non-Bluetooth car audio systems, home stereo, wired headphones, speaker, amplifier and home theater Connect two Bluetooth devices at the same time to listen to music, make phone calls and more Hands-free: Built-in microphone and a simple hands-free button to answer or cut incoming calls What's more, the adapter supports broadcasting navigation, you don't need to look down your phone for safe driving Multi-function: support U disk playback, NFC function, total 3 keys: next song/volume up, previous song/volume down, multi-function button (MFB), and when turned on again, it will automatically connect to the last paired Bluetooth device Space-saving: compact size, lightweight, easy to carry to the office or travel Convenient to use with various devices Specification: Material: plastic; Size: 78x50x18mm/3.1x2x0.7in Interface: 3.5 RCA USB Features: U disk, hands-free call, NFC call; Bluetooth protocol: AVRCP, A2DP SNR: 90dB Transmission distance: 10 meters Weight: 32g Transmission speed: 100Mbps Auxiliary equipment: support two mobile phones to connect Model: BLS-B21 The package includes: 1 x USB Bluetooth adapter