UGREEN Car Bluetooth Audio Receiver

Model: CM596 | P/N: 90748

Package Contents

1x Car Bluetooth Audio Receiver
1x 3.5mm Audio Adapter
1x 3.5mm Male to Male Audio Cable (1m)
1x USB-A to USB-C Cable (0.5m)
1x User Manual

Product Overview

The product is a compact Bluetooth audio receiver with several ports and buttons.

1: 3.5mm Audio Output
2: Reset Button
3: MFB Button (Multi-Function Button): Used for Power On/Off, Pairing, Factory Reset, Reconnecting, Taking/Ending/Rejecting Calls, and Play/Pause.
4: Indicator Light
5: USB-C Power Supply Port
6: Volume Up / Previous Track Button
7: Volume Down / Next Track Button
8: Microphone (Mic)

Operation

Button	Function	Operation
MFB Button	Power on/Power off	Press and hold for 3s
MFB Button	Play/Pause	Short press once
MFB Button	Take a call	Short press once
MFB Button	End a call	Press once
MFB Button	Reject a call	Short press twice
MFB Button	Factory reset	(Power off) Press and hold for 10s
MFB Button	Language switching for voice prompts	(Pairing) Press 3 times
+ Button	Volume up	Short press once
+ Button	Previous track	Press and hold for 2s
- Button	Volume down	Short press once
- Button	Next track	Press and hold for 2s
RESET Button	Reset (Force shutdown)	Insert a sharp tool (e.g. SIM-eject tool) into the hole and gently push it.

Bluetooth Pairing

Press and hold the MFB button for 3s until the voice prompt "Power on" is heard. The blue indicator will light up for 1s. The device will automatically enter pairing mode, indicated by the red and blue indicator flashing alternately. On your phone, turn on Bluetooth, search for "Ugreen-90748", and connect. A "Connected" voice prompt confirms the connection. To power off, press and hold the MFB button for 3s until the "Power off" prompt is heard. The receiver will auto-connect to the last used device when powered on again.

Dual Connectivity

To connect two devices simultaneously:

Connect the receiver to Phone A and turn off Bluetooth on Phone A.
Connect the receiver to Phone B.
Turn on Bluetooth on Phone A; the receiver will automatically reconnect to it.
Both Phone A and Phone B are now connected to the receiver.

Notes

If Bluetooth connection fails, ensure the receiver and phone are not connected to other Bluetooth devices. Restart the receiver if issues persist.
To factory reset, with the power off, press and hold the MFB button for 10s. The indicator will stay on for 5s upon successful reset.

Battery Level and Charging

Battery level is typically shown on the mobile phone's status bar. A "Battery low" voice prompt indicates the battery is below 10%. Charge the device promptly.

LED Indicator Light Status & Voice Prompts

Operation	Status	LED Indicator	Voice Prompts
Power on/Power off	Power on	Blue Indicator on: 1s	Power on
Power on/Power off	Power off	Red Indicator on: 1s	Power off
Power off after 5-minute no connection	Power off	Red Indicator on: 1s	Power off
Factory reset	Factory reset	Blue Indicator on: 5s	/
Bluetooth connection	Pairing	Red and blue Indicator flash alternately	/
	Pairing successful	Blue Indicator blinks every 10s	Connected
	Disconnected	Red and blue Indicator flash alternately	Disconnected
Reconnecting	Reconnecting	Blue Indicator blinks every 5s	/
Reconnecting	Dual connectivity	Blue Indicator blinks every 10s	Connected
Music/Calls	Play	Blue Indicator quickly blinks twice every 10s	/
	Pause	Blue Indicator blinks every 10s	/
	Incoming call notification	Incoming call notification	Blue Indicator blinks every 3s	/
Battery	Battery low	Red Indicator blinks every 10s	Battery low
Battery	Charging	Solid red	/
Fully charged	Fully charged	Red indicator off, solid blue indicator	/
Language switching	Voice prompts	Red and blue Indicator flash alternately	中文 / English

Specifications

Model: CM596
Bluetooth Version: 5.3
Bluetooth Protocol: AVRCP, A2DP, HFP, HSP
Output: 3.5mm Audio
Charging Port: USB-C
Frequency Range: 2400MHz-2483.5MHz
Frequency Response: 20Hz-20kHz
Output Voltage: >0.7Vrms
Max. RF Out Power: 6dBm (conducted)
SNR: ≥90dB
Codecs: SBC/AAC
Battery: Lithium Polymer Battery
Battery Capacity: 300mAh 3.7V (1.11Wh)
Charging Limited Voltage: 5.25V
Charging Time: About 2 Hours
Runtime: About 15 Hours
Transmission Distance: 15m/49ft (No Blocking)

Warnings

If the battery level is low before storing, charge it in time.
When using after long-term storage, charge for 30 minutes before turning on.
Do not dismantle, crush, squeeze, or expose the Li-po battery to fire.
Stop using if the product is swollen.
Do not expose to extreme temperatures.
Stop using if the battery is submerged.

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