Joyroom JR-CB2S Bluetooth 5.4 2-in-1 Receiver Transmitter User Manual

1. Introduction

The Joyroom JR-CB2S is a versatile Bluetooth 5.4 2-in-1 receiver and transmitter designed to bring wireless audio capabilities to a wide range of devices. With its dual TX/RX modes, smart LED display, and long-lasting battery, it offers a seamless audio experience for both transmitting and receiving signals.

Key Features:

• 2-in-1 Functionality: Easily switch between Transmitter (TX) and Receiver (RX) modes.
• Smart LED Display: Provides clear information on device status, battery level, connected devices, and volume.
• Extended Battery Life: Built-in 400mAh battery offers up to 30 hours in TX mode and 18 hours in RX mode (at 60% volume).
• Bluetooth 5.4 Technology: Ensures low latency and a stable connection up to 15 meters.
• Dual Device Connection: Supports connecting to two devices simultaneously (e.g., two headphones in TX mode, or two smartphones in RX mode).
• Compact Design: Mini size allows for easy placement without taking up much space.
• Intuitive Controls: Independent buttons for music playback and volume control.
• Versatile Connectivity: Includes 3.5mm audio cable and RCA cable for broad compatibility.

2. Package Contents

Please check the box for the following items:

• 1 x Joyroom JR-CB2S Bluetooth Transmitter Receiver
• 1 x 3.5mm AUX Cable (14cm Length)
• 1 x USB C Charging Cable (63cm Length)
• 1 x RCA Cable (28cm Length)
• 1 x User Manual

3. Product Overview

Familiarize yourself with the device's components and controls.

• Confirm Button: (Center button) Used to confirm selections or actions.
• Sound Reduction Button: (Left button) Decreases volume.
• Sound Increase Button: (Right button) Increases volume.
• LED Lamp: Indicator light for device status.
• Display Screen: OLED screen showing TX/RX mode, battery level, connected devices, and volume.
• Mode Switching (TX/RX) Switch: Physical switch on the side to toggle between Transmitter and Receiver modes.
• Power Button: To turn the device on/off.
• 3.5mm Audio Interface: For connecting to audio sources or output devices.
• Type-C Charging Port: For charging the device (data transfer not supported).

4. Setup and Operation

4.1 Charging the Device

Before first use, fully charge the JR-CB2S using the provided USB-C charging cable and a compatible USB power adapter (not included). The Type-C port is for charging only and does not support data transfer.

4.2 Powering On/Off

• To Power On: Press and hold the Power button until the LED display lights up.
• To Power Off: Press and hold the Power button until the LED display turns off.

4.3 Switching Between Transmitter (TX) and Receiver (RX) Modes

Use the physical TX/RX switch on the side of the device to select the desired mode.

4.4 Transmitter Mode (TX) Setup

In TX mode, the JR-CB2S transmits audio from a non-Bluetooth device (e.g., TV, computer, airplane entertainment system) to Bluetooth headphones or speakers.

1. Switch the device to TX Mode using the side switch. The display will show "TX MODE".
2. Connect the JR-CB2S to your audio source (e.g., TV, computer) using the 3.5mm AUX cable or RCA cable.
3. Turn on your Bluetooth headphones or speakers and put them into pairing mode.
4. The JR-CB2S will automatically search for nearby Bluetooth devices. Select your desired device from the list on the OLED display using the control buttons and confirm.
5. Once connected, audio from your source device will be transmitted to your Bluetooth headphones/speakers.

4.5 Receiver Mode (RX) Setup

In RX mode, the JR-CB2S receives audio from a Bluetooth-enabled device (e.g., smartphone, tablet) and outputs it to a non-Bluetooth audio system (e.g., car stereo, home speakers).

1. Switch the device to RX Mode using the side switch. The display will show "RX MODE".
2. Connect the JR-CB2S to your audio output device (e.g., car AUX port, home speaker) using the 3.5mm AUX cable or RCA cable.
3. On your smartphone or other Bluetooth-enabled device, go to Bluetooth settings and search for "JR-CB2S".
4. Select "JR-CB2S" to pair. Once connected, audio from your phone will play through the connected audio system.

4.6 Volume Control

Use the "Sound Increase" and "Sound Reduction" buttons on the device to adjust the volume. The current volume level will be displayed on the OLED screen.

5. Specifications

Detailed technical specifications for the Joyroom JR-CB2S.

6. Troubleshooting

If you encounter issues with your Joyroom JR-CB2S, please refer to the following common problems and solutions:

• Device not powering on: Ensure the device is fully charged. Connect it to a power source using the USB-C cable and try again.
• Cannot pair with a device:
  • Make sure the JR-CB2S is in the correct mode (TX for transmitting, RX for receiving).
  • Ensure your target device (headphones/speakers in TX mode, smartphone in RX mode) is in pairing mode.
  • Check that the JR-CB2S is within the 15-meter Bluetooth range.
  • Turn off and on both devices and try pairing again.
• No audio or poor audio quality:
  • Verify all audio cables (3.5mm AUX, RCA) are securely connected.
  • Check the volume levels on both the JR-CB2S and the connected audio devices.
  • Ensure there are no obstructions or excessive interference between the JR-CB2S and the paired Bluetooth device.
• Type-C earphone not working when plugged into JR-CB2S: The Type-C port on the JR-CB2S is exclusively for charging the device. It does not support audio output or data transfer for earphones.
• Calling functions not working in RX mode (car): The JR-CB2S Bluetooth adapter does not support calling functions. It is designed for audio streaming only.
• Initial connection unstable: While the device is designed for stable connections, if you experience instability, try resetting both the JR-CB2S and the paired device, then re-pair them.

7. Maintenance and Care

To ensure the longevity and optimal performance of your Joyroom JR-CB2S, follow these care guidelines:

• Cleaning: Wipe the device with a soft, dry cloth. Do not use liquid cleaners or aerosols.
• Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
• Avoid Water: This device is not waterproof. Keep it away from water and moisture.
• Handle with Care: Avoid dropping or subjecting the device to strong impacts.
• Charging: Use only the provided USB-C charging cable. Do not use damaged cables or chargers.

8. Warranty and Support

Joyroom products are manufactured to the highest quality standards. For warranty information and customer support, please refer to the official Joyroom website or contact your retailer.

• Free Returns: This product may be eligible for free returns within 90 days, depending on your purchase terms.
• Fast Delivery Guarantee: A $1.00 coupon code may be provided if delivery is delayed. Refunds are available if the package is lost or items are damaged, or if no delivery occurs within 30 days.
• Security & Privacy: Your personal details are protected and not shared with third parties without consent.

For further assistance, please visit the Joyroom Automobile Direct Store or consult the included manual.