Features: 1. HD recording, zero noise.2. Power off automatically saves the recording, automatically encrypts.3.HIFI MP3 music, fully charged in 30 minutes, continuous recording for 38 hours.4. Silent recording, no light display, no vibration.5. Rapid charging, fast forward and backward playback.6. Time setting forensic rights/7. Applicable places: schoolbags, collars, drawers, inside the car, etc.Description:Product color: blackMemory capacity: 8G/16GBody material: CNC copper titanium alloyRecording format: WAVRecording time: 38 hours continuous recordingStandby time: 68 hoursRecording mode: one-click recording, one-click saving, one-click playback/pauseMicrophone: Built-in HD microphoneSampling rate: 48KHZNumber of digits: 192KBPSBattery: Built-in environmentally friendly lithium batteryUSB: mini USBProduct specifications: about 3.5*3.5*1cm/3.58*3.58*0.39inProduct weight: about 10gPackage:1 x MP3 Voice Recorder1 x Earphone1 x USB Cable1 x Manual