Portable --- Small size, powered by DC 9V, simple and portable for use. DDS Frequency Range --- 1Hz-65534Hz, high-speed frequency () output up to 8MHz. Adjustable --- DDS signal amplitude of offset amount can be adjusted separately by two potentiometers. Wide DDS Signals --- sine wave, square wave, pulse wave, reverse sawtooth wave, triangle wave, ECG, and noise wave. Easy to Use --- LCD display for clear reading, intuitive touch buttons. It automatically saves the last used configuration. Function: UP output waveform selection DOWN output waveform selection LEFT output frequency - RIGHT output frequency + STOP / output stop / UP key Waveform order: ECG: electrocardiogram (in OFF mode, left and right to set the output frequency. Middle key, all subsequent waveform settings) Square wave: square wave Sawtooth wave: reverse sawtooth wave Triangle wave: triangle wave Specifications: Display: 1602 LCD Offset section value: 1, 10, 100, 1000, 10000 Hz Offset: 0.5pp-5Vpp Amplitude amount: 0.5Vpp-14Vpp Cable length: Approx. 70cm / 27.56inch Size: 135x80x32mm Color: as shown Material: ABS Package Contents: 1 x Signal Generator Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3cm.