Product image from current catalog dataProduct overview
A Budget On-Ear Sony Built Around Battery Life and Call Clarity
The Sony WH-CH520 (ASIN B0BS1PRC4L, black colorway) sits at the entry-level end of Sony's wireless headphone lineup. Per Sony's own regional specification pages, it runs Bluetooth 5.2, uses 30mm dynamic drivers with a rated 20Hz-20,000Hz frequency response, charges over USB-C, and supports the SBC and AAC codecs. Sony and the Amazon listing both advertise up to 50 hours of battery life with a 3-minute quick charge good for about 1.5 hours of playback, plus multipoint connection for pairing to two devices at once.
One honest flag on the data: while Sony's marketing and the Amazon listing consistently cite 50 hours of playback, one Sony regional spec-sheet rendering we pulled during research listed 40 hours for max playback time instead. That's a small enough gap it could just be a measurement-condition footnote rather than a real contradiction, but we'd rather note the discrepancy than quietly pick whichever number sounds better. We're using Sony's headline 50-hour figure since it's the one repeated across Sony's own marketing and the seller listing.
For independent, hands-on evidence beyond the spec sheet, TechGearLab tested the WH-CH520 directly and gave it an overall score of 44 out of 100, ranking it 23rd of 26 headphones in its comparison set - a below-average result. Their sub-scores are uneven in a telling way: sound quality came in at 5.6/10 (balanced bass and warm mids, but treble described as blurry at the edges and soundstage lacking depth), while comfort scored just 2.4/10, with testers noting the on-ear (not over-ear) design and earcup material becoming fatiguing after roughly two hours of continuous wear.
The one category where TechGearLab's testing stood out clearly positive was the microphone, scored 8.5/10 for crisp, clear calls with effective voice isolation even in moderately noisy settings - notably the headphone's best-performing attribute by a wide margin over its music playback scores. The same review also noted build quality is sparse: no carrying case, no included audio cable, and materials that feel like the price is largely paying for the Sony name rather than premium construction.
We also found an RTINGS.com review page for this exact model, but were not able to pull its detailed scores and findings during this research pass, so we're not citing specific RTINGS numbers here - only the TechGearLab data above, which we did verify directly. There is no active noise cancellation or transparency mode on this model, confirmed both by Sony's own spec sheet and by the independent test.
Overall, the picture that emerges from combining Sony's official specs with TechGearLab's independent testing is a headphone built around long battery life and clear calling rather than critical listening or extended comfort - worth knowing going in if your priority is different from that.
Key Listed Features
Up to 50 hours of battery life per charge, per Sony's spec sheet and the Amazon listing, with a 3-minute quick charge yielding about 1.5 hours of playback
Bluetooth 5.2 with multipoint connection, letting the headphones stay paired to two devices at once
30mm dynamic drivers with a 20Hz-20,000Hz frequency response, per Sony's official specifications
Built-in microphone that independent lab testing rated 8.5/10 for clear, crisp calls - the standout category in that test
Lightweight on-ear design (~147g) with soft earpads and a swivel hinge for flat storage
USB-C charging; no active noise cancellation and no carrying case included
