Features: Single power supply operation (built-in dedicated power management IC): single power supply operating voltage 9~15V. The circuit op amp works in dual power state (dual power supply amplification does not require a DC blocking capacitor to ensure high and low frequency signals are not distorted). It can output triangular wave, rectangular wave and sine wave, and forward and reverse sawtooth wave. Temperature drift of 200ppm/ degreesC. SYNC output with sync signal. Switching the waveform output by push button, easy operation. Adopts with clear acrylic shell, the signal generator is very beautiful and practical. Specifications: Material: PCB+acrylic Frequency Adjustment Range: 1Hz~20MHz Duty Cycle Adjustment Range: 15%~85% Low Loss True Sine Wave: 0.75% Triangle Wave Output Linearity: 0.1% Low Impedance Output Buffer: 0.1ohm DC Offset Adjustable: -5V~5V Adjustable Output Amplitude: 0.1V~9.5VPP (operating voltage 9V) Item Size: 99 * 59 * 32mm / 3.90 * 2.32 * 1.26in Item Weight: 82g / 2.90oz Package Weight: 89g / 3.14oz Package Size: 12 * 9 * 4cm / 4.72 * 3.54 * 1.57in Package List: 1 * Signal Generator 1 * Manual (English) Note: The Signal Generator is a DIY Kit, need to assemble by yourself.