This small circuit will produce a sine wave with a frequency of about 1KHz, ideal for testing electronic audio circuits. The circuit is based on a Wien-Bridge Oscillator which provides a sinusoidal output. It can be modified in order to produce other output frequencies such as 50 or 60Hz by simply replacing two resistors. Supply voltage: 9V DC. Includes 9V battery snap. As kit contains solder it may not be available for purchase in California.