KAIY Bluetooth 5.4 Receiver for Home Stereo, Optical Low Latency & HD Music Audio Bluetooth to RCA Adapter for Stereo/Speakers/Wired Speakers/Home Audio Music Streaming Stereo System, Support AUX/USB
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Availability:
In Stock.
Arrives
Friday, May 15
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Features
- UPGRADE YOUR LEGACY AUDIO SETUP: Bluetooth receiver for home stereo transforms vintage home stereos, car speakers, or old-school receivers into Bluetooth-ready powerhouses! This plug-and-play Bluetooth adapter lets you stream music from your phone, tablet, or laptop to any wired audio system. The Bluetooth audio receiver is perfect for upgrading classic setups without sacrificing nostalgia.
- UNIVERSAL CONNECTIVITY FOR ANY SETUP: 3-in-1 Outputs: RCA/AUX/Optical ports work with 99% ofspeakers, amplifiers.USB Flash Drive Support: Play music audio directly from a USB drive (no Bluetooth needed!). Vintage Stereo Savior: stereo receiver with Bluetooth breathes new life into old receivers with seamless wireless streaming.
- BLUETOOTH 5.4: Experience 33ft stable connectivity with the latest Bluetooth 5.4. Faster pairing, stronger signals, and zero audio delay. Bluetooth adapter for stereo receiver is perfect for parties, workouts, or relaxing at home without tangled wires.
- IMMERSIVE HIFI STEREO SOUND: Bluetooth adapter for old receiver powered by advanced wireless codecs, enjoy studio-quality audio with crisp highs, deep bass, and zero distortion.
- SMART LCD DISPLAY & EASY CONTROLS: The Bluetooth stereo receiver's intuitive LCD screen shows volume levels, playback mode, and connection status at a glance. Adjust settings directly on the Bluetooth adaptor for old receiver, no need to fumble with your phone mid-song.
- MULTI-ROOM AUDIO MADE SIMPLE: Sync multiple speakers via AUX/RCA/Optical cables for whole-home audio consistency. The Bluetooth receiver for speakers turns your living room, kitchen, and patio into a unified sound system for parties or daily vibes.
- BLUETOOTH RECEIVER ONLY: This Bluetooth aux receiver has no battery inside-connect the power supply before use. This Bluetooth home audio receiver is NOT for Bluetooth headphones. It can only connect to one device at a time.
- WARM TIPS FOR STABLE CONNECTION: To avoid signal drops or intermittent connections, please power the Bluetooth audio receiver stereo using a standard 5V/1A wall adapter (not included). Plugging the Type-C cable directly into a TV, PC, or projector USB port may provide insufficient power, causing the device to reboot. Additionally, to protect the device, it features an auto-standby mode and will sleep if no audio is played for 10 minutes.
Special Feature: bluetooth adaptor for old stereo, bluetooth to rca, convert wired speaker to wireless, home stereo bluetooth receiver See more
Brand: KAIY
Connectivity Technology: Auxiliary, Bluetooth, Optical digital, RCA, USB
Power Source: Corded Electric
Material: Acrylonitrile Butadiene Styrene (ABS), Aluminum, Metal, Plastic
Additional Features: bluetooth adaptor for old stereo, bluetooth to rca, convert wired speaker to wireless, home stereo bluetooth receiver
Enclosure Material: Acrylonitrile Butadiene Styrene (ABS), Aluminum, Metal, Plastic
Color: Black
Supported Media Type: USB Flash Drive
Includes Remote: No
Installation Type: Built-in
Display Type: LED
Power Source: Corded Electric
Rechargeable Battery Included: No
Voltage: 5 Volts (DC)
Compatible Devices: Home Stereo System, Speaker
Supported Standards: Bluetooth 5.4
Compatibility Options: HiFi amps, old stereo, vintage speakers
Supported Application: Apple Music, Pandora, Spotify, YouTube Music, iHeartRadio
Hardware Interface: 3.5mm Audio
Connector Type Used on Cable: Auxiliary, RCA
Number of Ports: 4
Audio Output Type: Speaker
Audio Input: 3.5mm AUX, RCA
Audio Output Mode: Stereo
Number of Channels: 2
Connectivity Technology: Auxiliary, Bluetooth, Optical digital, RCA, USB
Wireless Compability: Bluetooth
Bluetooth support?: Yes
Data Link Protocol: Bluetooth 5.4
Item Dimensions L x W x H: 2.9"L x 1.2"W x 3.3"H
Screen Size: 1 Inches
Brand: KAIY
Model Name: C37
Manufacturer: Dongguan Jieshengda Intelligent Technology Co., Ltd.
Unit Count: 1.0 Count
Warranty Description: 1 year manufacturer
Built-In Media: 3.5mm cable, Bluetooth Receiver Adapter, Optical digital audio cable, RCA output cable, Type-C power cable
Control Type: touch Control
Control Method: Push Button
Controller Type: App Control, Remote Control
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, May 15
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
The KAIY Bluetooth 5.3 Receiver is an excellent little device that instantly modernized my home stereo. Setup was incredibly easy—plug it in, pair, and it’s ready to go in seconds. The Bluetooth 5.3 connection is fast and very stable, with no dropouts, even from across the room. Sound quality is surprisingly good for such a compact receiver. Audio is clear, balanced, and loud enough without distortion, whether I’m streaming music, podcasts, or videos. I also appreciate the low latency, which keeps audio perfectly in sync. The build feels solid, the range is impressive, and it works flawlessly with my phone and tablet. For the price, this is a fantastic value and a simple way to bring wireless streaming to older stereo systems. Highly recommended for anyone looking for an easy, reliable Bluetooth upgrade!
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Reviewed in the United States on December 26, 2025 by smiller303
I bought this bluetooth unit so that I could send Echo Dot audio to my home theater receiver, which doesn’t have a native bluetooth input. It paired easily to the Echo Dot already in my living room, and I connected it to my receiver via the optical cable option, keeping the audio data digital all the way to the receiver. Looks great as it matches up aesthetically to my receiver. I put the unit on a smart outlet so that I could turn it on and off via Alexa voice control, which is handy for times when I don’t need/want more immersive sound, and my home theater receiver is turned off. The Echo Dot automatically toggles back to its internal speaker when the unit is off and connects immediately when the unit powers up. Though the unit has a momentary button for power/track control, it powers up on its own when the smart outlet applies power from shutoff, and the unit remembers the volume setting that it was last set to. The Echo Dot still retains its microphone access. Was very happy about all these things because it makes for a hassle-free, voice-controlled experience. The unit’s sound quality is excellent (expected in keeping an all-digital path via the optical cable connection). Its controls work properly. Audio data is captured and passed on flawlessly. Set it and forget it. The unit is very lightweight. I wouldn’t think it can handle rough treatment well. The kindly-supplied optical cable is stiffer than other optical cables, making its appearance management a little tougher. The supplied USB-C power cable is pretty short. Consider getting a longer one if you need more than a foot or so to power this unit. I have not tried the unit’s USB audio input option. I’m glad I bought this. It was originally an experiment that wound up delivering beautifully and inexpensively. Highly recommend.
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Reviewed in the United States on April 28, 2024 by Rob J. Rob J.
I recently integrated the KAIY Bluetooth 5.3 Receiver into my home stereo setup, looking to modernize my audio experience without replacing my existing components. After using it for a period, I've found it to be a generally functional device that delivers on its core promise of wireless connectivity, but with a slight caveat regarding ultimate sound fidelity. The primary appeal of the KAIY receiver is its ease of use and connectivity. Pairing my devices (smartphones, tablets, laptops) with the receiver was incredibly straightforward. The Bluetooth 5.3 standard ensures a stable and quick connection, and I experienced no noticeable dropouts or lag during playback within a reasonable range. This seamless pairing process means I can easily stream music from any of my Bluetooth-enabled devices directly to my stereo system, which is a huge convenience. It's a true plug-and-play experience, making it accessible even for those who aren't tech-savvy. The build quality feels decent for the price point, and its compact size means it tucks away neatly without cluttering my entertainment center. It successfully breathes new life into older audio equipment, allowing them to participate in the wireless audio ecosystem. However, where the KAIY Bluetooth 5.3 Receiver leaves a little to be desired is in its sound quality. While it's perfectly adequate for casual listening, background music, or podcasts, audiophiles might notice that the audio isn't as pristine or as full-bodied as a direct wired connection or a higher-end DAC. There's a subtle lack of depth or crispness that becomes more apparent with high-quality audio files or when listening critically. It's not bad by any means, and for most users, it will be perfectly acceptable, but if you're accustomed to very high-fidelity audio, you might perceive a slight compression or less dynamic range. Despite this minor audio nuance, the convenience and reliable connectivity it provides are significant. It's a fantastic solution for anyone wanting to add Bluetooth streaming to an existing home stereo without a substantial investment. It works reliably, connects easily, and for the price, offers excellent value. If absolute top-tier sound quality is your paramount concern, you might need to explore more expensive options, but for everyday wireless audio, the KAIY receiver is a strong contender.
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Reviewed in the United States on July 17, 2025 by Amity Bee
Cheap and Effective I recently bought a 4K TV because my 9-year-old 1080p set had started displaying “mouse tracks” across the screen—some driver or connection had clearly become intermittent. The missing pixels would come and go, but it was obvious that my old 65" flatscreen was on its last legs. Interesting side note: the old TV cost me $1,020 back in 2016, while the new 65" 4K model cost just $349! I figured I’d better buy one now in case tariffs push prices higher—even though this was a Korean brand, it was actually assembled in Mexico. One catch: the new TV had no audio outputs! And I wanted to keep using my existing high-end soundbar and subwoofer setup. First, I tried an HDMI eARC audio extractor—but it didn’t work. Then I bought THIS Bluetooth-based adapter. Success right out of the box. Simple to pair with the new TV. It includes 3.5mm-to-RCA outputs, but I only needed the optical SPDIF output, which matched how I had connected my soundbar to the old TV. Now I’m enjoying excellent sound with my “cheap” 4K TV—whose built-in speakers are, predictably, as underwhelming as most low-cost sets—thanks to this little gadget. Would recommend. Would buy again.
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Reviewed in the United States on April 18, 2025 by Frank R. Nichols