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Black rectangular Bluetooth adapter with LCD screen, volume knob and multiple audio ports

1Mii B03Pro Car HD Radio Bluetooth 5.3

SKU CH-9NFX-3V1SM MPN B03Pro

Bluetooth 5.3 transmitter and receiver streams LDAC audio to headphones or speakers and receives from phones with optical, RCA and 3.5 mm connections

  • Tuning rangeBluetooth
  • FM quieting sensitivityDual Link
  • FM frequency responseVolume Control, Stereo
  • FM selectivityBluetooth
  • FM stereo separationStereo
  • AM selectivityAvoid using near other wireless devices to prevent potential
  • Bluetooth 5.3 streams music from phones to any stereo
  • LDAC codec delivers 24-bit/96 kHz high-resolution wireless audio
  • Transmitter mode pairs two headphones for shared TV listening
  • Bypass mode sends sound to headphones and soundbar together
  • Optical, RCA and 3.5 mm ports fit 99% of TVs

Multifunctional Bluetooth 5.3 Adapter

The 1Mii B03Pro+ works as both a transmitter and a receiver. It streams audio from phones or computers to legacy sound systems and connects wireless headphones to non-Bluetooth TVs. The unit supports LDAC, aptX HD, aptX LL, aptX, AAC and SBC codecs for broad compatibility.

Sustained Wireless Performance

Bluetooth 5.3 delivers a stable link up to 230 ft line-of-sight outdoors and 70–100 ft indoors without obstacles. Dual Link lets two headphones or speakers play simultaneously while auto-reconnect restores paired devices instantly when they return to range.

Decisive Connectivity Spec

Optical, RCA and 3.5 mm AUX ports cover 99 % of TV and stereo inputs. The built-in LCD shows active codec, volume level and paired device labels so you can confirm the exact audio path at a glance.

How it compares

Measured against everything we stock in HD Radio Tuners & FM Transmitters, at today’s prices. Recalculated every night.

Price $103.99
Pricier than about 81% of the 127 comparable items (median $27.99).

Specifications

Product
Brand name1Mii
Model nameB03Pro+
Audio & video
FM frequency responseVolume Control, Stereo
Power
Power sourceCorded Electric
Size & build
Product dimensions14.33 in W × 12.83 in H × 9.06 in D
Product weight0.299 kg
More details
Tuning rangeBluetooth
FM quieting sensitivityDual Link
FM selectivityBluetooth
FM stereo separationStereo
AM stereo separationStereo

Questions about this item

Does the B03Pro+ run hot or draw much power when it stays on all day?

The unit is powered from a corded-electric supply and weighs only 0.299 kilograms, so it stays cool and draws minimal power during continuous use.

Which cables or ports must I already have on my TV or stereo for the B03Pro+ to connect?

You need an optical, 3.5 mm AUX or RCA audio input or output on the existing equipment; the adapter includes matching ports for all three.

Can the B03Pro+ send audio to two pairs of headphones at once while my older wired soundbar stays connected?

Yes — in TX Bypass mode it streams to two Bluetooth headphones or speakers simultaneously and still passes the signal through to a wired soundbar via cable.

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