With 's PIC16F648A,2.4 GHz frequency meter. Using temperature-compensated voltage controlled crystal oscillator (2.5 ppm -TCXO). gate control and precise time algorithm (non-timed interrupt). Gate (display refresh) time 0.01 seconds/0.1 seconds/1.0 seconds, real-time display frequency value. Single-ended input design, three-channel frequency measurement (low channel / high channel / Auto Channel).<br><br>: ELECTRICAL Measuring Range: Frequency Meter Display Type: Digital Only Light: Red light colour:Green Material:plastic<br><br>Package Contents: 1 x Cymometer<br><br>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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.