• Record Up to 67 Hours : Enjoy nearly 67 hours of continuous recording time in LP mode with 256MB of internal flash memory.
• High Sensitivity Detachable Stereo Microphone : Capture the richness you want with super-high-quality sound.
• New STXQ Recording Mode : Achieve remarkable sound quality
  with this improved recording mode.

Features

• 256MB Built in Memory hold up to 67 Hrs of recording 
• Several recording modes can be selected including stereo recording modes ST XQ or ST HQ, and three types of monaural recording modes including HQ,
• Three modes of microphone sensitivity to meet recording needs.
• Playback and store WMA and MP3 music files.
• High-sensitivity detachable stereo microphone included, offering excellent portability.
• Five voice folders can save up to 200 messages per folder. Music, Podcast, and Audible folder are also available.
• New, brighter high-contrast monochrome LCD panel with backlight.
• The voice guidance feature gives audio notification of operating conditions. It ensures seamless operation of various complex functions.
• Built-in Variable Control Voice Actuator (VCVA) function
• Timer Recording and Alarm features enable automatic recording and playing at a set time.
• The Low Cut Filter minimizes air conditioner noise and other similar noises while recording.
• Index mark and temp mark features allow you to quickly find desired locations
• Variable playback speeds can be controlled as preferred.
• Choose from four playback functions: Repeat, Skip, Fast, and Slow
• Noise Cancel Function and Voice Filter Function cut noise and enable clear audio playback.
• Can be used as a USB microphone or USB speaker.
• Can be utilized as external memory to store pictures, text data, etc.
• DSS Player Software (included) enables easy archiving, editing and further processing of recordings.
• By registering favorite Podcast programs in DSS Player, you can download the latest broadcasting content automatically. New content can be transferred to the recorder simply by connecting it to a computer
• Compatible with Audible.com files. Store and listen to audible contents purchased from Audible.com in the recorder.
• The optional AC adapter is available for longer recording.
• Up to 32 hours of continuous operation with two AAA batteries.

Specification 

Olympus DS-30 Recording Time