Features: Convenient 10 second voice recording and playing. High quality, voice restoration naturally. Can be used as megaphone module. With loop playing, inching-play and single-play functions. Can be controlled by single chip microcomputer. This module can directly drive the 8 0.5W small speaker. Specifications: Material: ABS-plastic Length: Approx. 4.25cm/1.673inch Main Chip: ISD1820 Working Voltage: DC3-5V Power Supply: 3-5V, which can connect to the pin for power on Recording and Playback Control Mode: key-control or microcontroller, IO-control line has been led out Key-controlled Audional Recording and Playback Operation Method: REC-key: recording button, press and hold to record, release to stop recording; RLAYE-key: trigger-mode playback, press once toplay the current whole voice; PLAYL-key: inching-mode playing, press and hold to play, release to stop playing; RPL-jumper: controlled by looping mode, which can be looped; FT-jumper: direct control, which can make the microphone voice direct to the speaker for playback; Note: Please allow 0-1cm error due to manual measurement, make sure you do not mind before you order. Please allow slight chromatic aberration due to different display resolutions. Package includes: 1 Set ISD1820 Voice Module