Features: For LibreCAL Electronic Calibration set enable calibration Antenna, eliminating manual mechanical adjustments while delivering 50dB below 3GHz and 40dB for professional testing. Featuring open source hardware design, this electronic calibration set maintain across 100KHz-6GHz frequencies while reducing cable wear through simplified connection workflows. Designed for engineers, telecommunications researcher, and technical professional requiring efficient high frequency circuit validation or antenna calibration in lab environments. Ideal for calibration during field maintenance, component analysis in facilities, or testing of communication equipment prototypes requiring repeatable measurement accuracy. Include protective storage bag and metal housing to safeguarding calibration integrity during transportation between workstations or outdoor deployment scenarios. Specifications: Component:Metal Size:Approx.8cm/3.15inch Package Includes: 1 Set LibreCAL Electronic Calibration note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.