1 One key record, one key save. 2 Voice activated recording, save the internal memory. 4 With built-in polymer battery, continuous recording 40 hours after a fully charging. 5 Recording while charging, charging the recorder by PC with the step removing the U disk, then can make the Uninterrupted recording. 6 Time-stamp, file named according to accurate time, convenient to check and manage the recording files.Power Supply: Polymer Battery 3.7V 160mAh. The item "Mini Spy Audio Recorder 94 hours Record Life Voice Activated Listening Device" is in sale since Thursday, December 12, 2019. This item is in the category "Business & Industrial\Office\Office Equipment\Dictation & Stenography\Dictaphones & Voice Recorders". The seller is "gp_eshop" and is located in Hong Kong. This item can be shipped worldwide.