HD recording, zero noise. Power off automatically saves the recording, automatically encrypts. HIFI MP3 music, fully in 30 minutes, continuous recording for 38 hours. Silent recording, no light display, no vibration. Rapid charging, fast forward and backward playback. Time setting forensic rights. Applicable : schoolbags, collars, drawers, inside the car, etc. Item type:MP3 Voice Recorder Memory capacity: 16G Recording format: WAV Recording time: 38 hours continuous recording Standby time: 68 hours Recording mode: one-click recording, one-click saving, one-click playback/pause Microphone: Built-in HD microphone Sampling rate: 48KHZ Number of digits: 192KBPS Battery: Built-in environmentally friendly lithium battery USB: mini USB Colour:black Material:plastic Package Contents: 1 x Voice Recorder 1 x USB Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.