1. Adopts low-temperature drift crystal, high-precision DDS frequency synthesis, high-frequency stability, resolution up to 0.001 Hz, and accuracy up to 0.001 Hz at low frequencies. 2. Up to 13 types of waveform output to meet different needs. 3. 1.8inch TFT colorful LCD display, direct input frequency via digital keypad, intuitive and convenient operation. 4. With sleep timer, signal lamp brightness adjustment, and display backlight brightness adjustment. 5. All configuration parameters can be automatically saved, so you don't need to reset time you start. Frequency Range: Sine wave 0.001Hz-200kHz (if the output amplitude is flat at 100kHz, the further increase in the output amplitude result in increased distortion); other waveforms 0.001Hz-20kHz (but the adjustable upper frequency limit is not a limitation; if the distortion and oscillation requirements are not high, the frequency can be further increased). Waveform Types: Sine, Square, Triangle, Forward Sawtooth, Reverse Sawtooth, ECG, Half-wave, , Gaussian, Singer, Exponential Rise, Exponential Fall, and 7.83Hz wave. Output Amplitude: 2.5V/V/PP Output Impedance: 330 ohms Display: 1.8-inch TFT display Power Supply: USB Type-C 5V Overall Dimensions: 127 x 98 x 18 mm Specifications: A:FG-300 with battery Color: As Shown Material: Metal Package Contents: 1 * Host 1 * Type-C Power Cable 1 * 4-Pin Signal Output Cable 1 * Stylus 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.