Frequency range: 27Mhz-3000Mhz CTCSS/DCS Decoder LCD Dim level setting Work by TCXO(Temperature Compensate X'tal (crystal) Oscillator) 2 - 2.5ppm Rresponse time: 0.2s. Color Display Build-in Li-ion battery Net Weight: 113g 4 buttons control Auto power off 1-9minutes Chaging battery LED indicator Package Contents: 1x SF401plus Frequency Counter 1 x UHF Antenna 1x User Manual 1x USB charger cable 1x USB AC adapter