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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.

Highlights

  • 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

Specifications

Brand1Mii
ModelB03Pro+
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 interference. Keep the battery away from extreme temperatures and humidity. Always dispose of the battery in accordance with local regulations., Stereo
AM Stereo SeparationStereo
Power RequirementCorded Electric
Dimensions14.33in W x 12.83in H x 9.06in D
Weight0.299 kilograms

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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