Item Type: Mini Voice Recorder_x000D_ Material: Zinc Alloy_x000D_ Frequency Range: 20Hz-20KHz_x000D_ SNR: 90dB_x000D_ Supported Systems: 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 10_x000D_ Built in Polymer Lithium Battery: 160mAh1STYLISH AND BEAUTIFUL: Mini recording device in zinc alloy, sandblasted black, 5D glass for concealment. Stylish and beautiful, with lanyard hole. 2MULTIFUNCTIONAL: Mini voice activated recorder supports MP3, WMA and WAV playback, fast forward and rewind. 3EASY TO OPERATE: Digital voice recorder with one touch recording function; in line delete function; playback LED indication. 4RECORDING FUNCTION: Digital voice recorder with ADPCM recording, 192Kbit optional sound control recording, 50DB auto split recording, loop override recording. 5LONG STANDBY TIME: Voice recorder with 35 hours of continuous recording and 30 days standby. Time stamped, time named recording files.1 xMiniVoiceRecorder1 x Earphone1 x Charging Cable1 x Manual