ICD-B500 Digital Voice Recorder, 256MB memory, Up to 22 hours Record Time
Sony ICD-B500. Maximum recording time: 150 h, Recording modes: LP, SP, Frequency range: 220 - 3100 Hz. Internal memory: 256 MB. Display: LCD. Output power: 25 mW, Loudspeaker diameter: 28 mm. Battery life (max): 22 h, Recording battery life: 20.3 h