Features: Furthermore clock high-precision TCXO design, DIP package accuracy 0.1-0.5ppm. Let Hackrf One can apply in the case of higher requirements, such as GPS clock analog, GSM / WCDMA / LTE data analysis. Scenario for GPS Applications and other situations require high-precision clock 100% brand new and high quality Before shipment through professional test equipment, allowing you to use assured. In order to solve all Hackrf One, the need for precision clock designed to meet the demand for high-precision clock Hackrf One of the birth. Package Includes: 1pc x Module Specifications: Applications: Hackrf One built-in External Clock Scenario: for GPS Applications and other situations require high-precision clock Operating temperature: -20c-85c Accuracy (PPM): 0.1ppm (room temperature 0-25 degrees) Size: approx 2.6X2.1X0.9CM/1.02x0.83x0.35in note: 1.Under the influence of light and the display, the color difference may decrease slightly. 2.Due to manual measurement, please allow size differences about 0-2cm. Thank you for your understanding.