Specification: The main chip: ISD1820 Size: 38mm * 42.5mm Working voltage: DC 3 ~ 5V Loudspeaker: 8Ω, 0.5W. Features : 1.An easy to use 10 seconds of voice recording 2.High-quality, natural voice restored 3.Can be used as propaganda module 4.With looping, jog playback, single-pass play function 5.Available single-chip control 6.This module can directly drive a small speaker 8 ohm 0.5W Power supply :3-5V, which can be accessed pin power; Audio recording control mode: the key to control or microcontroller, IO has drawn the line of control; Buttons control audio recording method of operation: REC button: record button, you can press and hold the recording, release the button to stop recording; RLAYE key: trigger mode playback, press will play this whole speech; PLAYL key: jog mode playback, press and hold until playback, release to stop playback; RPL Jumper: loop mode control, loop playback; FT Jumper: direct control, microphone voice through the speaker can playback; Voice Record Module is based on ISD1820, which is a multiple‐message record/playback device. It can offer true single‐chip voice recording, non-volatile storage, and playback capability for around 10 seconds.