If you want a transmitter with longer stated playtime while sending audio to two headphones, choose LENDAWAY 5.3; if you need two-way audio with Bluetooth 5.4 and clear mode indicators, choose SYENGKKY 5.4. For glasses wearers, these are adapters for connecting audio equipment—not earbuds—so the right choice depends on the source and listening setup you want to use with your glasses.
LENDAWAY 5.3 vs SYENGKKY 5.4 at a Glance
• SYENGKKY 5.4 strength: Supports TX and RX operation, with simultaneous pairing to two Bluetooth devices in either mode. Trade-off: Its stated battery life is up to 11 hours in TX mode and 14 hours in RX mode.
• Choose LENDAWAY 5.3 if you mainly want to send audio from a wired source to one or two Bluetooth headphones and value its longer stated TX playtime.
• Choose SYENGKKY 5.4 if you want a clearly described two-way adapter for both sending and receiving audio, with mode indicators to help identify its operating mode.
LENDAWAY 5.3 is a 3.5mm Bluetooth transmitter and receiver. Its most distinctive use case is TX mode: connect it to a wired audio source, such as a television or airplane audio jack, and pair it with Bluetooth headphones. It can connect to two headphones or earbuds at once, which makes it a practical option for two people listening to the same program without using speakers.
Its stated playtime is up to 14.5 hours with one paired device and up to 13 hours when paired with two. The listed wireless reach is 10 meters, or 33 feet. It also supports RX mode, including hands-free calling through car audio, with button controls described for answering, ending, or rejecting calls. Those details make it worth considering if you want one small adapter for travel listening and a compatible car-audio setup.
Choose it if sharing TV or flight audio is a priority, or if the longer stated TX playtime fits your plans. Skip it if you need the product’s two-device pairing to work in both TX and RX modes: the supplied details specify simultaneous two-headphone pairing in TX mode, not across both modes. And if you’re shopping for comfortable wireless earbuds for glasses wearers, remember that this is the adapter that connects audio devices; it does not establish whether any particular earbuds will feel comfortable with glasses.
How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-23 · 6 min read · Independent comparison
SYENGKKY 5.4 also works as a 3.5mm transmitter and receiver, but its description spells out the two directions of use. In TX mode, it sends audio from a non-Bluetooth source, such as a TV or airplane jack, to Bluetooth headphones or speakers. In RX mode, it receives audio from a Bluetooth source such as a smartphone and passes it through a 3.5mm cable to a car stereo, home audio system, or headphones.
The flexibility extends to pairing: the product details say it can connect to two Bluetooth devices simultaneously in both TX and RX modes. Battery life is stated as up to 11 hours in TX mode and up to 14 hours in RX mode. Its indicator is described as red in TX mode and blue in RX mode, a small but useful distinction if you switch between sending and receiving audio.
Choose SYENGKKY if your listening setup calls for switching between a wired audio source and a Bluetooth phone, or if two-device pairing in either mode matters to you. Its trade-off is that its stated TX playtime is shorter than LENDAWAY’s. It is still an adapter, not a set of earbuds, so people searching for the best in-ear earbuds for glasses wearers should judge the earbuds’ own fit separately from this connector’s features.
• Best for longer stated TX playtime → LENDAWAY 5.3. It lists up to 14.5 hours with one paired device and up to 13 hours with two; SYENGKKY lists up to 11 hours in TX mode.
• Best for two-way use with two Bluetooth devices → SYENGKKY 5.4. Its details specify simultaneous pairing in both TX and RX modes.
• Best for sharing airplane or TV audio with two listeners → LENDAWAY 5.3. Its TX mode is described as connecting to two Bluetooth headphones, earbuds, or earphones.
• Best for sending phone audio to a wired stereo → SYENGKKY 5.4. Its RX mode is specifically described as receiving Bluetooth audio and passing it through a 3.5mm AUX connection.
• Best if you want visible TX/RX mode cues → SYENGKKY 5.4. The described indicator is red for TX and blue for RX.
• Best if car hands-free call controls matter → LENDAWAY 5.3. Its details describe using a button to answer, end, or reject calls in RX mode.
• Best fit for glasses wearers choosing an audio adapter → Neither based on glasses fit alone. These products connect audio sources to headphones or stereos; neither sheet describes an earbud design or how it sits alongside glasses.
The key distinction is not the Bluetooth version number by itself. It is how you expect to use the adapter. LENDAWAY’s strongest case is its TX-oriented sharing and longer stated TX battery life. SYENGKKY’s is its clearly specified flexibility across both directions, including two-device pairing in RX mode.
That difference matters in ordinary situations. If you mainly want to watch a show from a TV or airplane jack with another person, LENDAWAY’s two-headphone TX setup is the clearest match. If you also want to stream from a phone to a wired car or home stereo, SYENGKKY lays out that route explicitly. Its mode colors may also make it easier to tell which direction the adapter is set to use.
Neither product’s details provide a basis for judging how comfortable a particular pair of earbuds will be with glasses. The adapter handles the audio connection; comfort depends on the headphones or earbuds you pair with it. So, for glasses wearers, treat this as a source-connection decision first, then choose eyewear-compatible listening gear separately.
My Verdict
For glasses wearers, my recommendation is to choose the adapter based on the audio source and pairing needs, then assess the headphones’ fit on their own. This is an adapter comparison, not a comfort comparison between earbuds.
FAQ
Yes. Its details specify simultaneous connection to two Bluetooth headphones, earbuds, or earphones in TX mode. They do not specify two-device pairing in RX mode.
Yes. TX sends audio from a wired source to Bluetooth devices; RX receives Bluetooth audio and sends it through a 3.5mm AUX connection to compatible audio equipment. Its details also describe two-device pairing in either mode.
These are 3.5mm Bluetooth adapters, so comfort depends on the headphones or earbuds you use with them.
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