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Automatically Reconnect Paired Devices

• When BT05 restarting after the first pairing, BT05 will 
  automatically searching for Bluetooth devices that have been  
  paired. The RX/TX light flash slowly.
• Short press A or B button will end the automatically reconnect  
  and enter Bluetooth pairing mode. The RX/TX light flash fast.
• If it is not connected any device within 30 minutes, BT05 will 
  automatically shut down. 

Clear Bluetooth Pairing History

• Long press A or B button for 8 seconds until the TX or RX stop 
  flashing and stay on for two seconds (at this time other 
  indicators will all shut down), the device will clear the historical 
  paired Bluetooth devices and re-enter the pairing mode.

Bypass Mode

Bypass Mode

Use the BYPASS function if your TV only has ONE OPTICAL/AUX 
Output which is currently occupied by your AV receiver or 
soundbar. Toggle between BYPASS and Bluetooth mode using a 
simple switch, no need to unplug any cable. In Bypass mode, 
BT05 can be used as a decoder to convert audio between 3.5mm 
AUX and optical output.

How to use?

Step 1: 

Connect DC in: Connect the AC power adapter (no 

               include, recommend using a 5V/1A or 5V/2A phone’s AC 
               adapter.) to DC In socket via the Type C cable, and BT05 
               turn on.

Step 2:

 Connect input & output: Use 3.5mm audio cable to 

               connect the “TX AUX” or use optical cable to connect the 
               “TX OPTICAL” as input, use another 3.5mm audio cable to 
               connect the “RX AUX” or use optical cable to connect the 
               “RX OPTICAL” as output.

Step 3:

 Switch Bypass mode: Long press [M] 2 seconds to switch 

               transmitter mode, Bypass light on.

Step 4: 

Switch Bypass channel: Long press [   ] 2 seconds to 

               switch Bypass channel. Please read the following table to      
               select the Bypass channel.

Step 3

Step 4

Step 1

DC IN

Power On/Off

Bypass channel

Light on

M

Step 2

RX AUX

RX AUX

RX OPTICAL

RX OPTICAL

TX AUX

TX AUX

TX OPTICAL

TX OPTICAL

Summary of Contents for BT05

Page 1: ...Due to the complexity of using the product please read the user s guide in detail Fosi Audio BT05 Bluetooth Transmitter Receiver User s Guide ...

Page 2: ...ing the best solution to build your multiple home audio systems Bluetooth Version Bluetooth 5 0 Frequency Range 2 4GHz 2 480GHz Support Profiles A2DP AVRCP Operational Range RX 65 164Ft 20 50M TX 98 196Ft 30 60M Product Size 50x55x39 inch 127x140x100 mm Bluetooth Name Fosi Audio BT05 Support Audio Codec aptX aptX LL aptX HD SBC Operating Temperature Storage Temperature Input Voltage DC5V USB Type ...

Page 3: ...ions DC 5V Power Input aptX aptX LL aptX HD Bluetooth Antenna TX AUX TX Optical Power on off play pause Volume down Device A Pairing Switch AUX Optical input Device B Pairing RX Optical RX AUX Switch TX RX Bypass work mode Volume up ...

Page 4: ...UX Optical input Short press this button to pair device A the mode light flashes fast Long press for 2 seconds to disconnect the paired Bluetooth device Long press for 8 seconds to clear Bluetooth pairing history Short press this button to pair device B the mode light flashes fast Long press for 2 seconds to disconnect the paired Bluetooth device Long press for 8 seconds to clear Bluetooth pairing...

Page 5: ...ass through mode In TX and Bypass mode short press to volume down In RX mode short press to previous track long press to volume down In TX and Bypass mode short press to volume up In RX mode short press to next track long press to volume up Long press to switch aptX audio format Note Please check that your Bluetooth input device or Bluetooth output device supports aptX aptX LL aptX HD audio otherw...

Page 6: ...put port to your amplifier car speakers headset etc Step 3 Switch receiver mode Long press M 2 seconds to switch receiver mode RX light flashing Step 4 Switch output method Long press 2 seconds to switch optical aux output OPT AUX light on Step 5 Pair Bluetooth device A Short press button A to pair for Bluetooth device the RX LED will flash quickly to enter the pairing mode Step 6 Connect BT05 dev...

Page 7: ...ode Step 9 Connect BT05 device Turn on your device s Bluetooth searching Fosi Audio BT05 and connecting After the connection is complete the B indicator stays on Step 10 Now enjoy it Step 2 Step 1 Step 3 Step 5 Step 7 Step 4 DC IN Power On Off RX LED Light on Enjoy it OPT AUX M RX AUX RX OPTICAL Step 6 Bluetooth connect Light on or Step 8 Step 6 Step 9 RX LED Bluetooth Step 10 Enjoy it Bluetooth c...

Page 8: ...matically reconnect After restarting BT05 device will automatically searching for Bluetooth devices that have been paired the RX light will flash slowly and the new device will not be able to search for the BT05 Fosi Audio BT05 If you need to connect to a new Bluetooth device please short press the A button to enter Bluetooth pairing mode then the RX light will flash fast and the new device will b...

Page 9: ...press 2 seconds to switch optical aux input OPT AUX light on Step 5 Pair Bluetooth device A Short press button A to pair for Bluetooth device the TX LED will flash quickly to enter the pairing mode Step 6 Connect BT05 device Turn on your device s Bluetooth and enter pairing mode BT05 automatically connect to your Bluetooth device After the connection is complete the A indicator stays on Step 7 Now...

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Page 11: ...rn on your device s Bluetooth and enter pairing mode BT05 automatically connect to your Bluetooth device After the connection is complete the B indicator stays on Step 10 Now enjoy it Transmitter Mode Step 2 Step 1 Step 3 Step 5 Step 7 Step 4 DC IN Power On Off TX LED Light on Enjoy it OPT AUX M TX AUX TX OPTICAL Step 6 Bluetooth connect Light on or Step 8 Step 6 Step 9 TX LED Bluetooth Step 10 En...

Page 12: ...pter no include recommend using a 5V 1A or 5V 2A phone s AC adapter to DC In socket via the Type C cable and BT05 turn on Step 2 Connect input output Use 3 5mm audio cable to connect the TX AUX or use optical cable to connect the TX OPTICAL as input use another 3 5mm audio cable to connect the RX AUX or use optical cable to connect the RX OPTICAL as output Step 3 Switch Bypass mode Long press M 2 ...

Page 13: ...If it is not connected any device within 30 minutes BT05 will automatically shut down Clear Bluetooth Pairing History Long press A or B button for 8 seconds until the TX or RX stop flashing and stay on for two seconds at this time other indicators will all shut down the device will clear the historical paired Bluetooth devices and re enter the pairing mode Bypass Mode Step 3 Step 4 Step 1 DC IN Po...

Page 14: ... and not connected to another device Please ensure the A and B indicators are not lighting at the same time If the A and B indicators are lighting at the same time long press A or B button for 2 seconds to disconnect the paired Bluetooth device and then connect the new Bluetooth device The first time you pair make sure the pairing distance is within 3feet 1meter Please ensure that the Bluetooth he...

Page 15: ...the button 2 seconds to select the correct audio cable connection Aux 3 5mm In Aux 3 5mm Out only AUX lights on Optical Input Optical Output only OPT lights on Aux 3 5mm In Optical Out AUX OPT and RX optical socket lights on Optical In Aux 3 5mm Out AUX and OPT lights on RX optical socket lights off 4 Volume button not working In RX mode long press to increase the volume long press to decrease the...

Page 16: ...sure that your Bluetooth device supports aptX aptX LL aptX HD audio or that the Bluetooth device aptX aptX LL aptX HD functions is turned on Otherwise you will not be able to use the features and APTX LL HD will not light up Please consult the supplier of this Bluetooth device for more support 9 Can t get higher aptX audio aptX LL aptX HD when connecting two Bluetooth devices and the devices thems...

Page 17: ...er of this Bluetooth device for more support 12 Can it be used as a converter from optical input to RCA output Yes you can switch to bypass mode to convert the optical input to the aux 3 5mm output and use an additional 3 5mm to RCA cable for your purposes 13 No sound playback from Bluetooth headsets Bluetooth speaker in optical input mode on TV or other devices Please ensure the BT05 is in transm...

Page 18: ... BT05 is muted or the output volume is too low please raise the volume 15 Unable to search the Bluetooth name Fosi Audio BT05 of BT05 device Please make sure BT05 is not in automatically reconnect state automatically reconnect state will not be able to search BT05 with new devices Please short press A or B button to enter pairing mode the new device will be able to search for the Bluetooth name Fo...

Page 19: ...s have an 18 month limited warranty on parts and labor from the date of purchase Please contact us if you have any problems About Fosi Audio Fosi Audio designs and builds innovative audio products with all your music in mind Great sound simple but elegant designs high quality materials and truly useful features are what Fosi Audio is about We sincerely hope you get as much enjoyment from our produ...

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