1Mii B03 Bluetooth 5.3 Transmitter Receiver for TV Stereo

If you want to add modern Bluetooth audio to an older TV, connect headphones without disturbing others, or stream music from your phone into a wired sound system, the 1Mii B03 provides flexible inputs and outputs, long-range connectivity, and multiple aptX codecs to suit different listening needs. It works as a transmitter (TX) to send audio from TVs and media players to Bluetooth headphones or speakers, or as a receiver (RX) to feed wireless audio into a traditional stereo system.

How does the B03 improve my TV listening experience?

The B03 lets you wirelessly route your TV’s audio to Bluetooth headphones or speakers with minimal delay when paired with aptX Low Latency or aptX Adaptive devices. It also supports simultaneous output to a wired soundbar and Bluetooth headphones so household members can listen independently.

• TX mode sends TV audio via optical, RCA, or 3.5mm outputs.
• aptX Low Latency/Adaptive reduces lip-sync lag when supported by both devices.
• Dual output lets headphones and a wired speaker play at different volumes.
• Set TV audio format to PCM for optical output compatibility.

What connectivity and codec options are available?

The B03 offers both digital (optical) and analog (RCA, 3.5mm) ports to match almost any TV or stereo. It supports aptX Low Latency, aptX Adaptive, and aptX HD for better synchronization and higher-resolution audio where supported, and can pair two Bluetooth devices at once.

• Optical input/output for TVs and modern equipment.
• RCA and 3.5mm jacks for older receivers and portable players.
• aptX codecs for low-latency and hi-res streaming when compatible.
• Dual Bluetooth connections for two headphones or speakers simultaneously.

How far will the Bluetooth connection reach and how reliable is it?

Designed for extended coverage, the B03 achieves significantly longer range than standard Bluetooth adapters. In open line-of-sight scenarios it can reach up to about 230 feet (70 meters), while typical indoor performance is around 80–110 feet (25–35 meters) depending on obstacles and interference.

• Up to 230 ft (70 m) open-air range in ideal conditions.
• Approximately 80–110 ft (25–35 m) inside homes with walls and furniture.
• Stable connection intended to reduce dropouts and interruptions.

Can the B03 work both as a transmitter and receiver at the same time?

No — the B03 operates in one mode at a time. Choose either transmit (TX) to send audio from a source to Bluetooth devices, or receive (RX) to play Bluetooth audio through a wired system; switch modes before use.

• Single-mode operation: select TX or RX prior to pairing.
• Clear mode switching so functions don’t overlap or conflict.
• Indicator lights and simple controls guide setup and pairing.

Who is this for: The 1Mii B03 is aimed at people who want to modernize legacy audio gear, families who need private listening alongside shared TV audio, gamers and movie-watchers who need low lip-sync delay with compatible headphones, and audiophiles looking to add aptX HD or Adaptive streaming to their setups. If you need flexible connections (optical, RCA, 3.5mm), extended wireless range, and multiple codec support in a single compact adapter, the B03 is a practical choice.