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Small black Bluetooth receiver box with 3.5mm optical coaxial ports and volume knob

KAIY C39HD Bluetooth 5.3 Audio Receiver 3.5mm Optical Coaxial 33ft

SKU CH-6J2D-WB01J

Adds Bluetooth 5.3 streaming to any system through 3.5 mm, optical or coaxial inputs with 33-foot range and TF card playback

  • Channels2
  • ConnectorsAuxiliary
  • Remote Controlfalse
  • Featuresbluetooth receiver for speakers
  • Dimensions & Weight2.75 in x 0.8 in x 2.48 in
  • Adds wireless streaming to 99% of audio systems via 3.5mm, optical or coaxial inputs
  • Bluetooth 5.3 chip delivers stable connection up to 33 feet with automatic reconnection
  • Optical port provides lossless digital audio while coaxial ensures rich Hi-Fi sound
  • TF card slot plays music directly up to 32GB without a phone or tablet
  • On-device volume control and 3D surround button adjust sound instantly without a remote

Universal Audio Upgrade

The KAIY C39HD adds wireless streaming to any system with a 3.5mm AUX, optical or coaxial input. It serves home stereos, car audio, TV setups, desktop speakers and vintage amplifiers that lack built-in Bluetooth.

Connection Check

Verify your equipment offers at least one of the three supported inputs. The optical and coaxial ports accept digital signals while the 3.5mm jack handles analogue sources. No drivers are required for initial pairing.

Build Integration

The compact receiver measures 2.75 x .8 x 2.48 inches and draws power from an external USB source. It supports TF cards up to 32 GB for local playback and provides a stable link up to 33 feet. Volume and 3D surround controls sit on the unit for direct adjustment.

Highlights

  • Adds wireless streaming to 99% of audio systems via 3.5mm, optical or coaxial inputs
  • Bluetooth 5.3 chip delivers stable connection up to 33 feet with automatic reconnection
  • Optical port provides lossless digital audio while coaxial ensures rich Hi-Fi sound
  • TF card slot plays music directly up to 32GB without a phone or tablet
  • On-device volume control and 3D surround button adjust sound instantly without a remote

Specifications

BrandKAIY
ModelC39HD
Channels2
ConnectorsAuxiliary
Remote Controlfalse
Featuresbluetooth receiver for speakers
Dimensions & Weight2.75 in x 0.8 in x 2.48 in

Questions about this item

What comes in the box with the KAIY C39HD and what must I buy separately?

The receiver unit and a power cable are included. You will need to provide your own 3.5mm AUX, optical or coaxial cable to connect to your amplifier or speakers, and a TF card up to 32 GB if you want local playback.

Which connection should I use — 3.5mm AUX, optical or coaxial — for the best sound on this model?

Use the optical port for lossless digital audio with a soundbar or home theatre, the coaxial port for a stable Hi-Fi connection, or the 3.5mm AUX for simple analogue hookup to powered speakers or a car stereo.

What does the 33-foot Bluetooth 5.3 range mean when the receiver is inside a real living room?

The 33-foot figure is an open-space maximum; walls and furniture will reduce it, but Bluetooth 5.3 keeps the link stable across a typical room and automatically reconnects to the last paired phone or tablet.

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