Note: Please allow some error due to manual measurement. Specification: Item Type: Mini Voice Recorder_x000D_Material: ABS_x000D_Recording Format: WAV_x000D_Music Format: MP3 WMA WAV_x000D_Built In Polymer Lithium Battery: 120mAh_x000D_Size: Approx. 21x68x10mm / 0.8x2.7x0.4in Features: 1NOISE REDUCTION: Voice recorder built in noise canceling chip, significantly reduce noise sound waves, stable recording in complex environments. 2EASY TO MANAGE AND CHECK: Mini voice recorder is easy to manage and query. Recording generation is automatically and accurately record the recording time. 3EASY 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. 4PLUG AND PLAY: Digital USB voice recorder is plug and play. One key to open the recording state, to meet the recording needs. 5MULTIFUNCTIONAL USE: Mini voice activated recorder is not only a USB flash drive, but also a recorder. Power failure automatically save. PackageList: 1 x_x000D__x000D_MiniVoiceRecorder 1 x Instruction Book