What the maker and the bundler put in writing
- “NOTE: This product was designed for older televisions with Stereo Audio connectors or a headphone jack: newer televisions with HDMI or Digital Optical should instead use headphone model WH-L600”
- “Requires use of RCA Audio Out or Headphone Jack on television”
- Bundle contents: “Mizco Travelocity In-Ear Headphone (Colors May Vary)”, “2x Deco Essentials Converter Adapter Type C Adapter, Type-C USB C Female To USB2.0 USB 2.0 A Male”, “Deco Gear Headphone Case”, “1 Year Premium Extended Service Protection Plan”
- In the box: “Sony Wireless Home Theater Headphones Black - AC Adaptor - Stereo Mini Cable - RCA Plugs Adaptor”
- 1.57 inch drivers · up to 20 hours · up to 150 ft · 277 g (9.8 oz)
- Dimensions 216 × 203 × 89 mm (8.50 × 7.99 × 3.50 in)
The same headphones, three times on one shelf
$91.88 renewed · $138 new · $189.99 here, bundled.
All three are the WHRF400. Same description, same warning about modern televisions, same 1.57 inch drivers, same 20 hours, same 150 ft, same 277 g (9.8 oz) on this listing and the new one.
So the question is only what $51.99 over the standalone new listing buys — and $98.11 over the renewed one.
Two adapters for a port this product does not have
“2x Deco Essentials Converter Adapter Type C, Type-C USB C Female To USB2.0 USB 2.0 A Male.”
The RF400 has no USB socket. It charges on the TMRRF400 transmitter dock, which is powered by the supplied AC adaptor.
And the standalone listing’s own box contents confirm it: “WHRF400R Headphones, TMRRF400 Transmitter, AC Adaptor, Stereo Mini Cable, RCA Plugs Adaptor, Rechargeable Battery” — no USB item of any kind.
So two of the four bundled accessories fit nothing on the product they are bundled with. They are generic adapters that will work on something else in the house; they have no relationship to these headphones.
What the other three accessories are worth
The one-year premium extended service protection plan is the item with real value, and the reason is specific to this product: the battery is a sealed rechargeable cell. That is the part that fails, and it is the part a warranty covers. On a shelf where ten of twelve products have sealed cells, a warranty extension is the sensible accessory.
The Deco Gear headphone case is genuinely unique here — nothing else on this shelf includes a case. Whether a case matters for headphones that live on a dock next to the television is a fair question, but it is a real object with a real use.
The Mizco Travelocity in-ear headphones are the odd item. A different product from a different maker, with no published specification of any kind — no driver size, no impedance, no frequency response, no connector type — and sold as “Colors May Vary”, which means you do not choose. They are a giveaway, not a feature.
Its box list omits the transmitter
This listing says it contains: “Sony Wireless Home Theater Headphones Black - AC Adaptor - Stereo Mini Cable - RCA Plugs Adaptor.”
No transmitter. No rechargeable battery.
The standalone $138 listing is complete and specific: “WHRF400R Headphones, TMRRF400 Transmitter, AC Adaptor, Stereo Mini Cable, RCA Plugs Adaptor, Rechargeable Battery.”
The TMRRF400 is not an accessory — it is the radio base and the charging dock. The headphones do nothing at all without it.
An incomplete list is the likeliest explanation, since the AC Adaptor that is named is the transmitter’s own power supply, and a dock-charged product cannot be sold without its dock.
But on a bundle priced $51.99 above the complete standalone listing, a box list that omits the component that makes the product function is worth confirming before ordering.
The dimensions differ too: 216 × 203 × 89 mm (8.50 × 7.99 × 3.50 in) here against 249 × 184 × 343 mm (9.80 × 7.24 × 13.5 in) on both other RF400 listings — presumably the bundle’s own carton.
Read the description before the bundle
“newer televisions with HDMI or Digital Optical should instead use headphone model WH-L600.”
Sony naming a different model from its own range is the most useful sentence attached to this product, and it survives the bundling.
The bullet puts it as a requirement: “Requires use of RCA Audio Out or Headphone Jack on television.”
RCA pair or headphone socket present — this works. Only HDMI and optical — it does not, and nothing in the bundle changes that, because what is missing is an analog output.
If your set is modern, the shelf offers: the three Earbay listings with optical, RCA and AUX supplied, from $52.99; the Holdsound and 1Mii transmitters; and the Avantree at $159.99 — thirty dollars less than this bundle — which is the only product here with HDMI ARC.
What the RF400 is genuinely good at
Underneath the bundling, the headphones themselves have a real advantage that Sony never advertises.
The link is analog RF, which has no buffer — nothing to fill, nothing to decode, nothing to re-clock. So there is essentially no latency at all.
None of the three Sony listings publishes a latency figure, while five cheaper products are proud of staying under 40 ms. Forty milliseconds is a good threshold — roughly where the eye catches a voice not matching a mouth, and far better than ordinary Bluetooth’s 150 to 250 ms on the SBC codec. But zero is better.
What it costs is hiss. A bullet on all three Sony listings reads “For Static sound issue, please refer the ‘trouble shooting steps’”, because analog radio degrades like FM radio — gradually, into noise. The Sennheiser RS 120-W at $159.95 aims straight at it: “Digital wireless transmission ensures no analog static.”
And the 1.57 inch driver is the only driver size published anywhere on this shelf.
What is not published
No latency figure, though it has the least delay here.
No frequency response and no signal-to-noise ratio. Only the Sennheiser RS 195 at $264.03 publishes a measurement on this shelf: “Analog input: typ. 85 dBA at 1 Vrms, Digital input: > 90 dBA”.
Nothing at all about the bundled earphones.
No volume limit, on a product sold for dialogue. Only the Avantree addresses that subject, by stating what it will not do.
And the cell is sealed — which is exactly why the protection plan is the item in this bundle worth paying for. Only the Sennheiser RS 120-W publishes replaceable batteries anywhere on this shelf: “Two rechargeable batteries: 1.2 V (AAA), NiMH”.
Availability
At the check, the American Amazon store stood at roughly $190.
These numbers are what Keepa carried on the day this page was last built. Stock and prices move without notice.
Prices quoted in this text were read on 4 October 2026. The live price is at the top of the page.
