Sony ICD-TX660The ICD-TX660 digital voice recorder for up to 636 hrs of audio recording fits conveniently in any pocket with its lightweight and ultra-thin metallic design and is ready to use right out of the box.Features:-Slim metal body with lightweight and ultra-thin design -Integrated digital stereo microphone -OLED display -16 GB built-in memory -Max. Number of files: 5000 (199 per folder) -Calendar search for recordings -One Push Recording function - recording starts immediately even if the device was turned off -High visibility LED light indicator for recording status -Recording formats: Linear PCM / MP3 -Max. Recording time: -21 hrs 35 min (LPCM 44.1 kHz/16 bit) -159 hrs. (MP3 192 kbit/s) -238 hr. (MP3 128 kbit/s) -636 hr. (MP3 48 kbit/s mono) -recording battery life: -12 hr. (LPCM 44.1 kHz, 16 bit) -17 hrs. (MP3 192 kbit/s, MP3 128 kbit/s, MP3 48 kbit/s mono) -Recording frequency response: -95 Hz-20,000 Hz (LPCM, 48 kHz, 16 bit) -95 Hz-18,000 Hz (MP3 192 kbit/s) -95 Hz-16,000 Hz (MP3 128 kbit/s) -95 Hz-14.000 Hz (MP3, 48 kbit/s mono) -Recording features: -Auto Voice Recording for voice recording with reduced background noise -Scene Select -Recording Monitor -Low Pass Filter -VOR -Playback and editing: -Playback formats: MP3 / WAV / WMA / AAC -Repeat function (A/B) -Digital pitch control (speed control) -Simple search function -Noise Cut technology -Track marking -Time Jump function to skip 10% of the total playback time of a recording -Integrated lithium-ion battery -USB-C connector for battery charging and PC networking -Dimensions (W x H x D): 102 mm x 20 mm x 7.4 mm -Weight: approx. 29 g.