AT&T MF279 - Specifications

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Specications
Dimensions 6.30" (W) × 6.30" (D) × 1.30" (H)
Weight 15.87 oz. (including backup battery)
Backup Battery 3,000 mAh
Talk Time Up to 150 minutes
Standby Time Up to 27 hours
NOTE: Actual talk and standby time may vary with the actual environment.