Nylavee computer speaker Nylavee computer speakers equip with 4pcs dual-magnetic and dual-diaphragms speaker units & 2 extra independent bass diaphragms on the back to provide excellent high pitch and deep powerful bass performance. ✅30°angle design of Nylavee computer speakers, provide more accurate sound propagation. ✅Two sounding modes: balance and bass. ✅Two connection methods: Bluetooth 5.0 & 3.5mm Aux-in. ✅USB powered, plug & play. ✅Service: Hassle-free 18-month warranty & professional customer support 7/24h. ✅Package includes: *1 pair of speakers *1 AUX cable *1 user manual Troubleshooting 1. No sound: 1) Another input source or connection mode is selected. Solution: Select an appropriate input source and connection mode. 2) The volume of speakers or audio device is adjusted too low. Solution: Increase the volume level on speakers or on the audio device. 3) Input jacks on a playback device are connected. Solution: Connect the output jack on the playback device instead of input jack. 2. Noise issue: 1) Damaged audio port or audio cable Solution: Change another audio device and audio cable to try again. 2) The sound bar is too close to another digital or high-frequency device. Solution: Move those devices away from the speakers. 3) Voltage instability of audio device Solution: Plug the USB cable into a outlet using the wall charger. 4) Noise in the audio file itself Solution: Switch to higher quality audio files 3. Sound cut in and out 1) Bluetooth connection distance over 33ft. Solution: Keep the connection distance within 33ft. 2) The sound bar is too close to another digital or high-frequency device. Solution: Move those devices away from the speakers. 3) Voltage instability of audio device Solution: Plug the USB cable into a outlet using the wall charger. Compatible system: Window 7, 8, 10, 11/ Linux/ Unix/ Mac. etc. (Note: Please update the driver in the system to latest version) Compatible monitor brand: Monitors with USB A port