This tool compares latency between speaker/wired earphones and wireless earphones.

❌ Single test results have no reference value because human reaction time itself takes about 150~300ms after hearing a sound.

✅ The correct approach: First test speaker, then test wireless earphones, take the difference. Since human reaction time is constant, the difference represents the additional latency of wireless earphones.

Test each device 3~5 times. The more stable the difference, the more reliable the result.

How to use:

1. The system will play one two three go audio

2. When you hear "go", click the button immediately

3. Click several times, observe the average difference at the bottom