YESIDO USB Wireless Audio Transmitter/Receiver | YAU40

The YESIDO YAU40 is a compact USB device that converts wired audio systems into Bluetooth-enabled ones. Plug it into any USB power source (like a car charger or PC) and connect your AUX-equipped speaker or sound system. The YAU40 supports Bluetooth 5.0 and works in both transmitter and receiver modes, enabling wireless music streaming or hands-free calling through your existing stereo setup. Perfect for car audio systems, desktop speakers, or portable AUX speakers.

• Model: YAU40
• Bluetooth Version: 5.0
• Functions: Transmitter & Receiver modes (switchable via button)
• Power: USB 5 V (USB-A plug, no battery)
• Audio Output: 3.5 mm AUX jack
• Controls: Built-in call/answer and mode button
• Compatibility: Most Bluetooth devices; works with car stereos, AUX speakers, desktops
• Latency: Low audio delay for smooth playback
• Build: Plastic housing with LED indicator
• Size & Weight: Ultra-compact (~50×20×11 mm; ~8 g)
• Ideal Use: Add wireless BT to AUX devices, drive time entertainment, hands-free calls, office audio upgrade