4. Double side adhesive tape (3M sticker ) on the back , so you can stick this sound module the box ,when you open the box ,it will play a sound ,when you close the box ,it will stop playing sound .
How to Recorder and Playback ?
Press and hold the recording button, hear the beep sound and speak to the microphone to start recording. Release the recording button to play the currently recorded sound. When this sound module sees light ,it will play a sound automatically ,when the light is gone ,it will stop playing sound .