Features: This product is crafted from ABS, using low-temperature drift crystal oscillators and dedicated chip, resulting in good frequency stability of the product; This product not only outputs 7.83Hz 0.01Hz~100000Hz waves, but also incorporates programmable frequency modulation technology, which can adjust the frequency in the ranges of 0.01Hz to 100000Hz; Available in two option: without housing and with housing, to be selected according to demand; Digital circuit crystal oscillator frequency reference, more stable and strong interferences resistant; The power interfaces adopts USB interfaces, which is convenient to use. Specifications: Material:ABS Working voltages: DC5V Power interface: USB Default frequency: 7.83Hz Adjustment ranges: 0.01Hz~100000Hz sine Waves Type:with Housing,without Housing (optional) Size:Approx.150mm/5.91''x100mm/3.94'' Package Includes: 1Set Low Frequency Pulse Generator note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.