SURECOM SF-103 Portable Frequency Counter 2MHz-2.8GHz w/build-in Li-ion battery. SF-103 Portable Frequency Counter 2MHz - 2.8GHz. ♢ Demon Slayer. TFT Color Display 240 x 320 ,LCD Dim level setting. Work by TCXO(Temperature Compensate X'tal (crystal) Oscillator) ,In the range of -45 ℃ ~ 65 ℃ can reach ± 2 ~ ± 4ppm accuracy.
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