UGREEN Bluetooth 6.0 Receiver for Car with LDAC, AI Noise Cancelling 3.5mm AUX Bluetooth Car Adapter, Hi-Res Wireless Audio Receiver for Home Stereo/Wired Speaker with Hands-Free Call,15H Battery Life

Why it's worth it

The BT509 plugs into your aux jack and streams over Bluetooth 6.0, with LDAC support for phones that can use it and a mic that holds up at highway speed. Two phones can stay paired, and a charge runs about 17 hours.

It's the best-sounding aux adapter here, as long as your phone can keep up. UGREEN builds in LDAC and lists the receiver as Hi-Res Audio certified, which puts its ceiling at 24-bit/96kHz. Most adapters in this category stop at AAC or plain SBC, and you can hear that on busy tracks — cymbals smear, bass gets vague. Pair it with a phone that supports LDAC and the extra headroom is real.

The Bluetooth 6.0 radio pairs fast and holds on. Older 5.0-era receivers are the usual suspects behind stuttering audio and clipped GPS prompts. This one grabs your phone as you start the car and stays put, and owners report keeping a clean connection well past the length of a driveway. If your current adapter drops out every time you set your phone in the door pocket, that's what you're fixing.

From our review of 10 car bluetooth and aux adapters, by Ben Carter, Tech Editor

What we like

• +It's the best-sounding aux adapter here, as long as your phone can keep up
• +The Bluetooth 6.0 radio pairs fast and holds on
• +Calls come through clearly enough for work
• +Two phones can share one aux jack

What to know

• –LDAC only helps if your phone speaks LDAC
• –It talks, and it doesn't whisper