Features:

• 2-in-1 BLuetooth transmitter and receiver: Support TX and RX mode (Each mode support single device input and single device output)
• Quick pairing: Quick search the devices around and pair with the device with the strongest signal.
• Automatic reconnection: Connect to the previously paired device automatically when powering on.
• TF card supported: up to 32GB TF card, Plug and play in RX mode, save more time. (TF card is not included in the box)
• Rich interfaces: AUX (input & output 2-in-1); RCA (input & output 2-in-1)
• Long distance: Up to 10 meters

Specifications:

• Model: C39S
• Bluetooth version: 5.0
• Power supply: DC 5V/1A (Should use USB-A to USB-C cable for power supply. USB-C to USB-C cable is not supported)
• Bluetooth protocol: EDR, A2DP, HSP, AVRCP
• Dimensions: 67mm* 67*mm* 23mm

Package include:

C39S...1pcs; USB-C power cable ...1pcs; 3.5mm AUX cable...1pcs; RCA cable...1pcs; User manual... 1pcs

BASIC BUTTON CONTROL:

• Switch TX/RX mode: Hold 'Previous' and 'Next' simultaneously for 3 seconds
• Volume control: Hold 'Previous' to volume down, hold 'Next' to volume up
• Select music: Press 'Previous' or 'Next'
• Play/Pause/Confirm: Press 'M'
• Search again (in TX mode): Double click 'M'

ADVANCED USING TIPS:

• Double-click 'M' to search again, up to 9 devices around will be found, you'll know the information on the display, if the top right corner of the display shows ‘1/4’, it means that a total of 4 receiver have been found and paired with device 1, and then C39S will pair with the device with the strongest signal automatically. (If there are too much devices, due to signal interference, it may not find all, so please try more times)
• If you want to change paired devices, please double-click the 'previous' or 'next' button to activate the selection status, and then click 'previous' or 'next' to select.
• After selecting is done, press 'M' to confirm within 3 seconds, or it will exit the selection status.
• Manual restart: Press and hold 'M' for 8 seconds to restart. This operation will clear the memory of C39S, and will enter the TX mode, pair with the device with the strongest signal.
• Beware of your TV becoming a speaker: If your TV has Bluetooth function already, it's better to turn off the TV's Bluetooth temporarily. This is because the Bluetooth function of the TV is bidirectional. The TV may work as a receiver, pair with the Bluetooth transmitter without your attention. At this time, the TV becomes a speaker, and the Bluetooth transmitter cannot be paired with the real speaker.

• Question 1: Why does it can't connect with Bluetooth headsets or speakers?

1. Please confirm TX or RX mode are set correctly.

2. Bluetooth headsets/speakers must be working in pairing state. (Some headsets need to enter the pairing state manually)

3. It is possible that the Bluetooth transmitter has been paired with other receiver. (Notice whether the top right corner of the display shows ‘1/4’? it means a total of 4 receiver have been found and paired with device 1). So you need to change the paired device, please double-click the 'previous' or 'next' button to activate the selection status, and then click 'previous' or 'next' to select. After selecting is done, press 'M' to confirm within 3 seconds, or it will exit the selection status.

• Question 2: Will it automatically reconnect to the previously paired device every time it turns on?

Generally it is. However, if you haven't used it for several days, or there are other interference sources nearby, it will not reconnect automatically, please double click M to search and pair again.

• Question 3: Why does it power off or disconnect without any warning?

1. The power consumption of this product is very low, which will make the power bank unable to recognize that there is a device that needs power supply and enter the sleeping mode, so this product will be shut down.

2. The USB port of old TV may also be under voltage. (Voltage<3V, the product will not work; 3V-3.5V, effect may be poor; >3.5V, work normally).

• Question 4: Why does it has a delay in sound transmission?

All Bluetooth products will have sound delay. We've improved our product, the sound delay can fully meet daily needs (about 120ms in the lab).

However, wireless transmission is never as fast and efficient as wired transmission. If you really need an audio experience without delay - for example, playing games which needs sound and picture synchronization, it is recommended to use traditional wired audio devices.

• Question 5: Why does it can't work with TV?

Make sure you have pluged the cable to the output port of the TV when you're using this product as a Bluetooh transmitter.