AT&T TL7700 - Manual (Page 42)

Appendix
38
RF frequency band 1921.536MHz - 1928.448MHz
Channels 5
Operating temperature 32°F - 122°F
0°C - 50°C
Charger voltage
(AC adapter output)
6VDC @400mA
Headset voltage 3.2VDC - 4.2VDC
Replacement battery 3.7V 240mAH
Technical specifications
38
DECT 6.0 digital technology
The AT&T DECT 6.0 products offer unsurpassed range performance and
sound clarity. This is achieved through a unique antenna design and
advances in noise-filtering technology. An independent laboratory has
confirmed that AT&T DECT 6.0 products outperform the range claims of
other headsets. Now calls can be taken in the basement, backyard and
garage with exceptional sound quality.
Operating range
This cordless headset operates within the maximum power allowed by
the Federal Communications Commission (FCC). Even so, this headset
and its base can communicate over only a certain distance, which can
vary with the locations of the headset and its base, the weather, and
the construction of your home or office.
Extended range and clarity
The TL7700 is a fully cordless DECT 6.0 headset offering a range of up
to 500 ft. Sound level protection technology conforms to the current
regulations and is used to filter out the loud and high-pitched noises.