Alarm NC NO wireless laser inferred beam switch relay motion senser security c2

This is a really cool kit. It comes with everything you see in the pictures.  

Check out the two videos below to see how it works and also how to wire up the kit. 

 Important information. 

 The laser is rated at 3v max

The input for the computer board/relay board is 12v

The buzzer is 6v max

 This kit includes. 

1x Photo sensor relay

3x pieces of thin aluminum 

5x pieces of shrink wrap

5x little mirrors 

2x 4AA battery holders

2x 2AA battery holders 

1x Piece of wire

1x 3V laser diode 

1x 3-6v buzzer