ISD1820 Voice Recording Boards Playback Module Features: Size: 50mm * 40mm * 15mm The main chip: ISD1820 The working voltage: DC 3 ~ 5V The main features: 1.Easy to use 10 seconds of voice recording 2.High-quality, natural voice restored 3.Can be used as propaganda module 4.With a loop, jog playback, single-pass playback 5.Available single-chip control