Description: Use 8 bit Microchip PIC16F648A,up to 1.1GHz Frequency reference: 5032 package 13.000 MHz Warming voltage controlled crystal oscillator ( VC - TCXO) , frequency stability is ± 2.5 ppm IF settings: The minimum frequency is adjustable in steps of 100 Hz, frequency range 0 ~ 999.9999 MHz, can be set to plus or minus IF mode Working voltage: DC input: DC 9V ~ 12V Working current: The backlight is enabled: ≤ 55 mA backlight disabling: ≤ 55 mA Specification: Gate time: 0.64 seconds Test sensitivity: 1 MHz ~ 10 MHz: superior 60mVpp 10 MHz ~ 60 MHz: superior 60mVpp 60 MHz ~ 1.1 GHz: not tested Display: maximum of 8 digit display Size(Length * width * height): 58mm × 32mm × 27mm / 2.28x1.26x1.06inch Board interface: RF INPUT ( measuring signal input ): XH2.54-2P side outlet port ICSP INPUT (MCU programming interface ): XH2.54-6P pins POWER INPUT ( Power Interface ): XH2.54-2P side outlet port Package Includes: 1 Piece of Frequency Counter