AT&T TL90078 - Manual (Page 29)

Appendix F
Technical specifications
25
RF frequency band 1921.536 MHz — 1928.448 MHz
Channels 5
Operating temperature 32°F — 122°F
0°C — 50°C
Handset voltage 2.4 — 3.2 VDC
Charger voltage
(AC adapter output)
6VAC @300mA
Replacement battery 2.4V 750mAH
Operation Operating time*
Talk time (handset) Up to nine hours
Talk time (speakerphone) Up to two hours
Standby Up to five days
* Operating times will vary depending on your actual use and the age of the
battery.