The LC ICL8038 module is designed for common frequency ranges. It is adjustable from 5 gears and generates low-distortion triangular waves, square and sine waves from 10Hz to 450KHz. Sine wave can be used for test signals, drive signals, carrier frequency signals, etc; square wave can be used for switching signals, trigger signals, etc; triangular wave is mainly used for scanning signals. Working voltage: 12V ~ 15V Output: Triangular wave, Square wave and sine wave. Frequency range: 10HZ ~ 450kHz Low distortion sine wave: 1% Duty cycle range: 2% to 98% Low temperature drift: 50ppm / Triangular wave output linearity: 0.1% Working temperature: 0 ~ 70 Board size: 54.5 x 37.8mm Functions: VCC,GND: working voltage AC: with DC bias output G: ground DC: pure signal output R11: Frequency adjustment R12: Square wave duty cycle adjustment R13: Sine wave linear adjustment R14: Amplitude adjustment R15: Square wave linear adjustment Jumper P2: select different waveforms(triangular, square or sine waves) Jumper P3: select different frequency ranges 10Hz-450Hz 90Hz-1.5KHz 940Hz-15KHz 6KHz-120KHz 20KHz-450KHz (Slight differences in parts not affect use) Color: As Shown Material: ABS Package Contents: 1 * ICL8038 Signal Generator Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.