Product Description: First, the main chip: ISD1820 Two, size: 38mm * 42.5mm Third, the working voltage: DC 3 ~ 5V Fourth, the main features 1, easy to use 10 seconds of voice recording 2, high-quality, natural voice reduction 3, can be used as propaganda module 4, belt loop, jog playback, single-pass playback 5, available single-chip control 6, the module can directly drive 8 ohm 0.5W trumpet