The Bluetooth audio adapter allows you to wirelessly transmit sound from your phone to your car speakers.
There is a Bluetooth connection between the adapter and the connected device, and the signal goes from the adapter to the AUX input in a car with a standard 3.5mm jack cable).
The BTR100X also has a remote output.
FEATURES:

Marine certified
Auto power on function
Certified Bluetooth 4.0 CRS I9chip
RCA output 1.0V signal output
QDL licensed
SSID name: BTR100

CONNECTIONS:

Blue: Remote output + 12V / 20mA
Red: +12V active (ACC) fuse 2A
Black: GND
3.5mm jack

PAIRING:

Make sure your device's Bluetooth is turned on
Turn on the ignition (ACC)
LED (6) will start flashing (in pairing mode)
Select BTR100X in your device's Bluetooth setup menu
When the device is successfully paired, the BTR100X LED will stop flashing and remain lit. A single beep will be heard through the connected audio system

The BTR100X can be paired with multiple devices, but only one device can be connected at a time. The BTR100X remembers the last device that was connected and reconnects to it automatically.
If this device is not active, new or other paired devices can be connected manually.
If the connected device is out of range for more than one minute, the BTR100X will automatically disconnect and return to pairing mode [LED (6) will start flashing].

After pairing, audio volume and media selection are controlled by the streaming device.