These high-tech audio devices will record hours of audio for you to easily play back! Just be careful when using these products, when recording someone sometimes you MUST have their consent. We cannot stress this enough. Different countries or states have either "One Party Consent" or “Two Party Consent” laws. One Person Consent means that only the person doing the recording has to give consent and does not have to notify the other party or parties that the conversation is being recorded. However in areas with Two Party Consent the person recording the conversation must notify all of the other parties that the recording is taking place and they must consent to the recording. Check out which applies to you before using these devices.