"A disposable-priced headphone where 'active noise cancelling' is primarily a marketing keyword."
The '35H Playtime' is achieved by pairing a small 400mAh battery with a very low-power Bluetooth chip and power-sipping audio drivers; this number is likely tested with ANC off at 50% volume.
This is a justifiable purchase for a child's first pair, a 'burner' set for the gym bag, or as an emergency backup. The wired option provides a functional safety net when the battery eventually fails to hold a charge.
Anyone seeking genuine noise cancellation for commuting, flights, or office work should skip this. Listeners who care about music fidelity will find the audio quality to be a significant compromise.