Olympus VN7700. Maximum recording time: 1151 h, Recording modes: HQ, LP, SP, Playback time: 57 h. Internal memory: 2048 MB. Display: LCD, Display diagonal: 35.6 mm (1.4 "), Display size (HxV): 25 x 25 mm. Output power: 190 mW, Loudspeaker diameter: 28 mm. Battery technology: Nickel–Metal Hydride (NiMH), Compatible battery sizes: AAA, Battery life (max): 86 h