Available capacities: 1G, 2G, 4G, 8G 16GB and 32GB The Ultra-thin Voice Recorder features 1GB of built-in storage, flip-out USB connector and flush-mounted controls. Ultra-Thin Voice Recorder is ideal for meetings, interviews and personal notes. It also comes with a built-in rechargeable Li-Ion battery and can be charge via a USB connection plus it has a built-in speaker and microphone and a status indicator LED lights. The Ultra-Thin Voice Recorder can be used as an MP3 Player or a USB flash drive plus its convenient and portable design means, you can take it with you anywhere without any hassle. Compatibility For Macs and PCs Operating System Windows XP/2000/ME/98/95 and Mac OS 8.6 and above Drivers Required only for Windows 98/95 Power No external power required LED Light LED indicates power, read/write Shock Resistance 1000G Data Retention 10 Year Minimum Warranty 1 Year Warranty