User`s manual

Appendix
56
Technical specifications
56
RF frequency band
1921.536MHz - 1928.448MHz
Channels 5
Operating temperature 32°F - 122°F
0°C - 50°C
Headset base voltage
(AC voltage, 60Hz)
96Vrms - 127Vrms
Headset base voltage
(AC adapter output)
6VDC @300mA
7VDC @300mA
Headset voltage 3.2VDC - 4.2VDC
Replacement battery 3.7V 240mAH