Fact · Dictation
100milliamperes
Philips says some computers limit the output power of their USB ports to 100 mA, which may not be enough for a SpeechMike to work properly.
Checked against its source on October 16, 2026
In the source's own words
“Some computer providers limit the output power of USB ports to 100mA. These ports may not provide enough power for the SpeechMike to function properly.”
SpeechMike Premium Air (SMP4000) user manual: troubleshooting, Philips Speech (SpeechMike user manual), 2026, Troubleshooting table, 'The SpeechMike is completely without function'.
Open the original- What it measures
- This entry is in Philips' troubleshooting table for the SpeechMike Premium Air. Its listed fixes are the supplied power supply unit or a self-powered USB hub.
- What it does not show
- The table says 'some' computer providers limit USB power, so most ports are not affected. The 100 mA figure is Philips' own number for the limit, and we did not measure it on any computer.