Step by step
- Connect your headphones and close other heavy apps or downloads.
- Play a YouTube audio-video sync test video with a visual flash and click.
- Watch the flash closely and note whether the click sounds slightly late.
- Compare wired mode (if available) against Bluetooth to see how much delay is wireless.
At a glance
| Delay level | How it feels | Common cause |
|---|---|---|
| Under 50 ms | Feels instant | Wired or low-latency codec |
| 50–150 ms | Noticeable in fast games | Standard Bluetooth AAC or SBC |
| Over 150 ms | Lip-sync looks off in video | Older Bluetooth or interference |
| Sudden lag spikes | Audio stutters or cuts | Weak signal or busy 2.4 GHz band |
Where to find it on your device
- Windows 11: Settings > Bluetooth & devices > Devices
- iPhone: Settings > Bluetooth
- Android: Settings > Connected devices > Bluetooth
Related questions
Does the tool on this page measure latency in milliseconds?
No, the tool on this page tests left and right channels, frequency sweep, bass, and phase. To check latency, use an audio-video sync clip.
Why do Bluetooth headphones have audio delay?
Wireless audio must be compressed, sent over radio, and decoded by the headphones, which takes extra time compared to a cable.
How can I reduce headphone latency?
Move closer to your device, turn off extra Bluetooth connections, or switch to a wired cable when gaming.
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Open the full headphone test →
Updated November 14, 2026.