1Mii ML300 Bluetooth 5.3 Transmitter Receiver User Manual

1. Introduction

The 1Mii ML300 is a versatile Bluetooth 5.3 Transmitter and Receiver designed to enhance your audio experience. It allows you to wirelessly stream audio from non-Bluetooth devices (like TVs, PCs, or gym equipment) to Bluetooth headphones or speakers (Transmitter Mode), or to stream audio from your Bluetooth-enabled phone/tablet to non-Bluetooth audio systems (like home stereos or car audio) (Receiver Mode). Featuring advanced Bluetooth 5.3 technology and support for aptX Low Latency, aptX HD, and aptX Adaptive codecs, the ML300 ensures stable, high-quality audio with minimal delay.

Image: The 1Mii ML300 Bluetooth 5.3 Transmitter Receiver units in black and white, showcasing their compact design and 3.5mm audio jack.

2. Safety Information

For wireless audio adapters, ensure that the device is used in accordance with local regulations and safety guidelines. Keep the device away from water and moisture. Do not attempt to open or disassemble the device, as this may cause injury or damage to the product. When charging the device, use a suitable power source and ensure that the charging port is free from debris or damage. Do not leave the device charging unattended or overnight. This product may cause interference with other wireless devices. If you experience any interference, please relocate the device or consult the user manual for further instructions.

3. Package Contents

Please check the package for the following items:

• 1Mii ML300 Bluetooth 5.3 Transmitter Receiver
• 3.5mm Audio Cable
• USB-C Charging Cable
• User Manual

4. Product Features

• Advanced Bluetooth 5.3 Technology: Provides a more efficient, stable connection, faster transmission, and wider signal range. Backward compatible with older Bluetooth versions.
• 2-in-1 Transmitter & Receiver: Easily switch between Transmitter (TX) and Receiver (RX) modes to suit various audio needs.
• aptX Low Latency/HD/Adaptive Support: Ensures synchronized audio and video with minimal delay (aptX Low Latency), high-fidelity sound (aptX HD), and dynamic audio adjustment (aptX Adaptive). Your connected Bluetooth devices must also support these codecs for full functionality.
• Dual Link Capability: Connects to two Bluetooth headphones or speakers simultaneously in Transmitter mode, allowing shared listening experiences.
• Wide Compatibility: Supports 3.5mm AUX and 2RCA audio input/output.
• Long Battery Life: Offers up to 12 hours in Transmitter mode and up to 15 hours in Receiver mode on a single charge.
• Compact and Portable Design: Ideal for use at home, in the car, on airplanes, or at the gym.

5. Setup Guide

5.1 Charging the Device

Before first use, fully charge the ML300 using the provided USB-C charging cable and a standard USB power adapter (not included). The charging indicator will show charging status and turn off when fully charged.

5.2 Powering On/Off

• To Power On: Slide the power switch to the 'ON' position.
• To Power Off: Slide the power switch to the 'OFF' position.

5.3 Selecting Mode (TX/RX)

The ML300 features a switch to select between Transmitter (TX) and Receiver (RX) modes. Ensure the correct mode is selected for your intended use.

Image: A visual guide illustrating the different connection scenarios for Receiver Mode (RX) and Transmitter Mode (TX), showing various devices like wired earphones, car stereo, wired speakers, boat, gaming consoles, airplane, gym equipment, TV/PC, tablets, cell phones, Bluetooth earbuds, speakers, and headphones.

6. Operating Instructions

6.1 Transmitter Mode (TX)

Use TX mode to send audio from a non-Bluetooth device to Bluetooth headphones or speakers.

1. Set the ML300 to TX mode using the switch.
2. Connect the ML300 to your audio source (e.g., TV, PC, MP3 player, gym equipment) using the 3.5mm audio cable.
3. Power on the ML300. It will automatically enter pairing mode, indicated by a flashing LED.
4. Put your Bluetooth headphones or speakers into pairing mode.
5. The ML300 will automatically search for and connect to your Bluetooth device. Once connected, the LED will remain solid.

Image: A person enjoying high-quality audio streaming from an airplane's in-flight entertainment system to their wireless earbuds using the 1Mii ML300 in Transmitter (TX) mode.

Image: A person running on a treadmill, wirelessly streaming audio from the treadmill's console to their earbuds using the 1Mii ML300, demonstrating freedom from wires during exercise.

6.2 Receiver Mode (RX)

Use RX mode to receive audio from a Bluetooth-enabled device (e.g., phone, tablet) and play it through a non-Bluetooth audio system.

1. Set the ML300 to RX mode using the switch.
2. Connect the ML300 to your non-Bluetooth audio system (e.g., home stereo, car stereo, wired speakers) using the 3.5mm audio cable.
3. Power on the ML300. It will automatically enter pairing mode, indicated by a flashing LED.
4. On your phone or tablet, enable Bluetooth and search for "1Mii ML300" in the list of available devices.
5. Select "1Mii ML300" to connect. Once connected, the LED will remain solid.
6. Play audio on your phone/tablet, and it will stream wirelessly to your connected audio system.

Image: A person connecting their smartphone to a boat's stereo system using the 1Mii ML300 in Receiver (RX) mode, enabling wireless music streaming on the water.

Image: A person using the 1Mii ML300 in Receiver (RX) mode to wirelessly stream music from their phone to an older home stereo system, modernizing its audio capabilities.

6.3 Dual Link Function (TX Mode Only)

The ML300 can connect to two Bluetooth headphones simultaneously in Transmitter mode.

1. Connect the first Bluetooth headphone as described in Section 6.1.
2. Once the first headphone is connected, press the 'BT button #2' on the ML300 to enter pairing mode for the second device. The LED for the second connection will flash.
3. Put your second Bluetooth headphone into pairing mode.
4. The ML300 will connect to the second headphone. Both LEDs will remain solid once both devices are connected.

Image: Two individuals comfortably watching television with separate wireless headphones, both connected simultaneously to the 1Mii ML300, demonstrating its dual link capability.

6.4 Switching Audio Codecs (TX Mode Only)

To optimize audio quality or latency, you can switch between supported audio codecs (aptX LL/HD/Adaptive) if your connected Bluetooth headphones also support them.

• While in TX mode and connected to a device, double-click the 'BT button #1' to cycle through available audio codecs.
• The ML300 will indicate the active codec (e.g., via LED color or pattern, refer to device indicators for specifics).
• Note: If your headphones do not support a specific codec, the ML300 will default to the highest common supported codec, typically SBC.

7. Maintenance

• Cleaning: Wipe the device with a soft, dry cloth. Do not use liquid cleaners or solvents.
• Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
• Battery Care: To prolong battery life, avoid fully discharging the device frequently. Charge it regularly, even if not in use for extended periods.
• Avoid Water: Keep the device away from water and moisture to prevent damage.

8. Troubleshooting

8.1 Device Not Powering On

• Ensure the battery is charged. Connect the ML300 to a power source using the USB-C cable.
• Verify the power switch is in the 'ON' position.

8.2 Cannot Pair with Bluetooth Device

• Ensure the ML300 is in the correct mode (TX for headphones/speakers, RX for phone/tablet).
• Make sure both the ML300 and your target Bluetooth device are in pairing mode (flashing LEDs).
• Bring the devices closer together (within 1 meter).
• Clear previous pairing records on both devices and try pairing again.
• Restart both the ML300 and your Bluetooth device.

8.3 No Sound or Poor Audio Quality

• Check all audio cable connections to ensure they are secure.
• Verify the volume levels on both the ML300 (if applicable) and the connected audio source/device.
• Ensure the ML300 is correctly paired and connected.
• If in TX mode, ensure your audio source is outputting sound through the 3.5mm jack.
• If in RX mode, ensure your audio system is set to the correct input (AUX).
• Move the ML300 closer to the connected Bluetooth device to reduce interference.
• If using aptX codecs, ensure both devices support the chosen codec.

8.4 Short Bluetooth Range

• Ensure there are no physical obstructions (walls, large metal objects) between the ML300 and the connected Bluetooth device.
• Avoid placing the ML300 near other wireless devices that might cause interference (e.g., Wi-Fi routers, microwaves).

9. Specifications

10. Warranty and Support

1Mii products are designed for reliability and performance. This product comes with a standard manufacturer's warranty against defects in materials and workmanship. For specific warranty terms and conditions, please refer to the warranty card included in your package or visit the official 1Mii website.

For technical support, troubleshooting assistance, or any inquiries regarding your 1Mii ML300, please contact 1Mii customer service through their official website or the retailer from whom you purchased the product. You can also visit the 1Mii Store on Amazon for more information and support resources.