Item Type: Digital Voice RecorderMaterial: Aluminium AlloyFrequency Range: 20Hz-20KHzSNR: 90dBSupport System: For Windows 98, for Windows ME, for Windows 2K, for Windows XP, for Windows 7, for Windows 8, for Windows 10, for Linux 6.2, for OS X 10Built in Lithium Polymer Battery: 90mAhPackage List1 x Digital Voice Recorder 1 x Headset 1 x Charging Line 1 x Description 1PREMIUM MATERIAL: The voice activated recorder is made of premium CNC aluminium alloy and is robust and durable. 2RECORDING FUNCTION: ADPCM recording 192Kbit, optional voice activated recording 50DB, automatic split recording, loop overlay recording. 3EASY TO USE: Recording files are named by time, easy to find. Black in colour, highly concealable and ultra small in size. 4SUPERIOR PERFORMANCE: Digital voice recorder with 15 hours of continuous recording and 30 days standby. One touch recording; with delete function; playback LED indication. 5MULTIFUNCTION: Digital voice recorder supports MP3, WMA, WAV playback, fast forward and backward playback.