More Freedom. With 4 USB ports, you can connect 4 more USB devices. Free from the restriction of limited USB ports.
Work More Easily. With it, you can use keyboard, mouse, U disk at one time. No need to plug and pull repeatedly.
High-speed Transmission. With USB 3.0, you can enjoy high transmitting speed up to 5Gbps (theoretically), shortening time of transmitting files.
OTG Function. Check files of U disk directly on your phone. (Note: Your devices should support OTG function.)
Wide Compatibility. It is compatible with mouse, keyboard, U disk, printer, scanner, USB fan, USB lamp, card reader, external HD, etc.
This BT Audio Adapter supports transmitter mode and receiver mode, and equips with multiple interfaces, enabling you to make full use of existing non-BT audio receivers and transmitters. Besides, it also supports NFC function to quickly connect with your phone. Feature:  BT 5.0 It offers stabler connection and wide compatibility. NFC Function With NFC sensing chip, your NFC-enabled phone can easily connect once you enable BT and NFC function. BT Transmitter Mode It allows you to use BT audio receivers like BT headset, BT speaker, etc to receive audio signal from non-BT audio transmitters like TV, desktop, etc. BT Receiver Mode It receives BT signals of BT audio transmitter like phone, tablet, laptop, etc and send them to non-BT audio receivers like wired headset, speaker, card stereo through cable. Multiple Interfaces With SPDIF, RCA and AUX ports, it is compatible with almost all kinds of audio transmitters and receivers, enabling you to make full use of existing devices.  Specification: BT version: V5.0 Operating distance: 15m Frequency range: 10Hz-20Khz SNR: ＜110dB Function: Transmitter & Receiver 2-in-1 Design Item size: 80* 80* 20mm/ 3.15* 3.15* 0.79in Packing list: 1 * BT Audio Adapter 1 * RCA cable 1 * AUX cable 1 * Charging cable 1 * User manual