Feature:1. NOISE REDUCTION: Voice recorder built in noise canceling chip, significantly reduce noise sound waves, stable recording in complex environments.2. EASY TO MANAGE AND CHECK: Mini voice recorder is easy to manage and query. Recording generation is automatically and accurately record the recording time.3. EASY TO USE: U disk voice recorder is easy to use, connect the OTG adapter (not included) with the USB recorder and for Android phone to play sound.4. PLUG AND PLAY: Digital USB voice recorder is plug and play. One key to open the recording state, to meet the recording needs.5. MULTIFUNCTIONAL USE: Mini voice activated recorder is not only a USB flash drive, but also a recorder. Power failure automatically save.Specification:Item Type: Mini Voice RecorderMaterial: ABSRecording Format: WAVMusic Format: MP3 WMA WAVBuilt In Polymer Lithium Battery: 120mAhSize: Approx. 21x68x10mm / 0.8x2.7x0.4in.Package List:1 xMini Voice Recorder1 x Instruction BookNote:Please allow some error due to manual measurement.