1、Noise Cancelling Recorder: This voice recorder adopts a stereo silicon microphone, 360 degree surround sound, noise reduction recording, providing clearer sound, making it suitable for more scenes 2、Automatic Gain Control: Automatically adjusts the volume of the microphone without causing fluctuations due to changes in the distance between the transmitter and microphone, reducing noise and distortion 3、Recording Time Setting: You can start recording every day at a scheduled or specific time to avoid processing individual files that are too large during the recording process, and set segmented times to save files 4、Intelligent Detection: This noise reduction voice recorder supports intelligent detection, recording when there is sound and stopping when there is no sound. It works efficiently without unnecessary fragments 5、Format and Battery: This HD voice recorder supports WAV recording format, MP3 WMA WAV playback format; Built in 300mAh battery, providing long lasting endurance and ensuring long term recording Item Type: Voice Recorder Material: Zinc Alloy, ABS Recording Format: WAV Playback Format: MP3/WMA/WAV Battery: Lithium Polymer Battery 300mAh (Built in) 1 x Voice Recorder 1 x User Manual 1 x Charging Cable