This is a simple and easy project for a beginner to electronics. As your first step in electronics, it will familiarize you with the electronics world and soldering. It comes with two red LEDs that blink at a rate of approximately 1Hz. It can be used in toys, on your car dashboard as a burglar deterrent, or as a night light you can wear. Supply voltage: 5 - 12V DC / 10mA. Includes 9V battery snap.