Convenient recording,Complete with a large LCD display and front controls, the ICD-BX140 is easy to use while capably capturing moments as they occur.. Built-in 4 GB flash memory1,4 GB of available internal flash memory provides ample space for recording life’s important moments-up to 4,175 hours in fact.1. Mono Microphone,Capture thoughts, dictations and other details with great clarity via the built-in microphone. Via an external microphone (sold separately). stereo recordings can also be made when necessary.. Automatic Record level,The recorder automatically adjusts recording levels for optimum results. Buy this product and Save $21 Off on a Sony Digital Voice Recorder - 4 GB Flash Memory - LCD - Portable - ICDBX140 - Refurbished for $18.99 with free shipping at Rakuten.com.