Feature: 1. High Resolution: The Frequency module signal generator can generate sine, triangle and square wave forms. 2. Adjustable Frequency: XR2206 function signal generator has a frequency of 1 hz‑1mhz, coarse and fine adjustment of frequency and amplitude. 3. High Accuracy: This XR2206 function signal generator with case is accurate and practical. 2 for one sale, easy to use. 4. Applicable: Signal generator DIY Kit has a wide range of power supply, using 9‑12V external power supply or 9V battery (not included). 5. Easy to Install: This is a DIY kit, all are through hole components, easy to assemble your own function generator. Easy to install. Specification: Item Type: Signal Generator Kit Material: PCB Size: Approx. 44.9 x 61.3mm/1.77 x 2.41in Voltage Supply: DC 9-12V Input Waveform: Square, Sine and Triangular Impedance: 600 Ohm + 10% Frequency Range: 1Hz-1MHz Sine Wave Amplitude: 0 - 3V at 9V DC Input Distortion: Less than 1% (at 1kHz) Flatness: +0.05dB 1Hz - 100kHz Square Wave Amplitude: 8V at 9V DC Input (no Load) Rise Time: Less than 50ns (at 1kHz) Fall Time: Less than 30ns (at 1kHz) Symmetry: Less than 5% (at 1kHz) Triangular Wave Amplitude: 0 - 3V at 9V DC Input Linearity: Less than 1% (up to 100kHz) 10mA. Package List: 1 x Signal Generator6 x Cases9 x Screws5 x Nuts2 x DIY Accessories1 x Instruction Manual Note: Please allow some errors due to manual measurement.