UGREEN 70601 CM309 Bluetooth 5.0 Car AUX Receiver

Overview

The UGREEN CM309 adds wireless music and hands-free calls to a car stereo that has an AUX input. It has an attached 3.5 mm plug for the stereo and an attached USB-A plug for power, so there are no loose cables to buy, and a built-in microphone for calls. It suits a car with an AUX socket and a USB port but no Bluetooth of its own.

Is it right for you?

• Suits a car with a 3.5 mm AUX input and a USB-A port close enough for the coiled lead.
• It has no battery, so it works only while USB power is present. For use away from a USB port, choose a battery-powered receiver.
• It connects one phone at a time and uses the standard SBC codec. If you need two phones connected or a higher quality codec, a different receiver would suit better.
• It is a receiver only. It cannot send audio to Bluetooth headphones.
• Not for cars without an AUX input.

Key features

• Bluetooth 5.0 receiver with an attached 3.5 mm AUX plug and an attached USB-A power plug.
• Built-in microphone for hands-free calls on phones that support them.
• Range up to 10 m in open conditions.
• Coiled lead in a compact car layout, so the cable stays tidy between the AUX and USB sockets.
• Zinc housing, 16.1 × 7.1 × 1.7 cm overall, about 18 g. Grey finish.
• Reconnects to a saved phone when powered and the phone is in range.

What else you need

• A car stereo or speaker with a 3.5 mm line-level AUX input and its own amplifier.
• A sound USB-A port supplying 5 V for power during use.
• A phone that streams Bluetooth audio.

Before you buy

• Receiver only: no battery, no transmission to Bluetooth headphones, no RCA or optical output, no multipoint, no AAC, aptX or LDAC and no USB data audio.
• It has no water-resistance rating. Keep the plugs dry and never connect power while damp.
• Pair, mount, choose sources and set the volume while parked. Hands-free calling does not remove your attention or legal responsibilities.
• Do not leave it on a hot dashboard, near a heater or in direct sun.
• Connect the 3.5 mm plug only to a headphone or AUX line-level input, never to speaker outputs, mains or unknown signals.
• Walls, metal and 2.4 GHz interference reduce range and can interrupt the link.
• Start at low volume and limit listening time.