![background image](http://html.mh-extra.com/html/vtech/am18247/am18247_user-manual_1053425089.webp)
82
Appendix
Technical specifications
RF frequency band
1921.536MHz - 1928.448MHz
Channels
5
Deskset voltage
(AC voltage, 50/60Hz)
100Vrms - 120Vrms
Deskset voltage
(AC adapter output)
6VDC @ 600mA
Optional backup batteries
2.4V 750mAh Ni-MH battery pack
Headset jack
2.5mm, 32ohm - 150ohm
Operation with backup battery
Operating time*
Talk time (corded handset)
Up to 7.9 hours
Talk time (speakerphone)
Up to 3.8 hours
Standby
Up to 4.5 days
* Operating times vary depending on your actual use and the age of the battery.