HP Internet Handset - Manual (Page 28)

Technical Specifications
Cable length 1.6 metres
Supply voltage 5 V DC ± 5% from PC USB port
Current consumption In use < 200mA
Standby, approx 500uA
Max power consumption 1W
Frequency response Microphone 100 Hz to 7 kHz
Speaker 300 Hz to 7 kHz
Ringer output >70dBA SPL
Keys 0–9, * and #
Scroll (Volume) up/down
Dial
End call
Microphone mute
Contacts/Tab
Hold
Voicemail
LED’s Voicemail
Ringer
Microphone mute
Certifications USB 1.1 and 2.0
Skype
24 HP Internet Handset User’s Guide