This cheap pair of headphones has no business sounding this good for the price

This review evaluates the Haylou S40 headphones as a strong budget option at just over $50, praising their comfort, long battery life (up to 90 hours ANC off/50 hours ANC on), removable mic, and solid performance after custom EQ via the Haylou app (despite the app requiring an account). The default sound is fairly flat and may not satisfy bass-heavy preferences without EQ, and button placement can cause accidental presses when putting them on or taking them off. Featuring Bluetooth 5.4, LDAC, hybrid ANC (up to 50dB), and dual drivers (40mm + 20mm), they deliver good value for casual listeners though unlikely to impress discerning audiophiles.