EC-364 (650-0833) Specifications Faxback Doc. # 3623 General Display: liquid crystal display Memory Capacity: 4,096 bytes Power supply: Main batteries - Two AAA-size batteries (Cat. No. 23-555) Back-up battery - One lithium battery (CR2032) (Cat. No. 23-162 Power Consumption: 0.2W Battery life: Main batteries - approximately 240 hours continuous operation approximately 1 year (1 hour use per day) Back-up battery - approximately 3 years after the low main battery warning appears on the display Auto power off: approximately 6 minutes after last key operation Ambient temperature range: 0 degrees C ~ 40 degrees C (32 degrees F~ 104 degrees F) Dimensions: Open: 13.5 (H) x 145 (W) x 179.5 (D) mm (1/2 " (H) x 5 3/4 " (W) x 7 1/8" (D)) Closed: 15.1 (H) x 145 (W) x 96.5 (D) mm (5/8" (H) x 5 3/4" (W) x 3 3/4" (D)) Weight: 138.2 g (4.9 oz) including batteries (br/all-12/13/94)