Sony ICD-PX312 Internal Memory + Memory Card Black Dictaphones (536H, Super (SHQ), MP3, 2048MB, USB, Alkaline)
Sony icd-px312. Maximum recording time: 536H
Recording Mode: Super High Quality (SHQ)
Support audio formats: MP3 Internal memory: 2048MB Interface: USB Battery technology: Alkaline
Size of compatible batteries: AA
Battery life: 72 hours. Carrier shapes accepted: Internal memory + memory card
Compatible memory cards: microSD (TransFlash), microSDHC, MS Micro (M2)
Built-in flash memory: 2GB

Sony ICD-PX470 Stereo Digital Voice Recorder with Built-in USB Voice Recorder, Black
Built-in, Direct USB connection for quick file transfer to your PC
Expand your memory with the micro SD card slot
Up to 55 hours of battery life for extended recording
Adjustable microphone range for clearer voices
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Sony ICD-TX650 Slim Digital PCM/MP3 Stereo Voice Recorder with OLED Bright Display, Black
Ultra slim and lightweight, instant recording, even when turned off, 360-angle sound recording, OLED bright display
Store over 4000 files with 16 GB built-in memory
Clear recordings from the built-in microphone in linear PCM/MP3 format, playback in MP3/AAC/WMA/WAV format
Built-in micro USB connecter, PC application software (sound organiser), stereo headphones, carrying case/pouch, USB cable supplied
Quick charge, built-in lithium battery with 15 hours recording time