✔  Powerful signal strength indicator to measure walkie talkies' continuous carrier signal frequency for wireless enthusiasts.
✔  Designed for counting continuous wave signal from Two-way Radio
✔  Easy ranges to choose and cover almost all the frequency
✔  Include frequency areas such as 2m HAM radio, all VHF and UHF (Frequency range: 27Mhz-3000Mhz)
✔  DMR Radio signal frequency counter.
✔ Easy battery level

Features:
CTCSS/DCS Decoder
LCD Dim level setting
Frequency digital 0.000 or 0.0000
Work by TCXO(Temperature Compensate X'tal (crystal) Oscillator) 2～2.5ppm
Color Display 240x320
Build-in Li-ion battery
Only four-button control means easy to use
Small size allows hand holding.
Auto power off 1-9minutes
Charging battery LED indicator
　

If Frequency Counter Cannot Check VHF Frequency

Solutions:
1) Swtich the ATT button into left hand side.
2) Then change the antenna into VHF or Dual band, as customer are using UHF antenna, but checking VHF band.

Package Contents
1x SF401 PLUS Frequency Counter
1 x UHF Antenna
1x English User Manual
1x USB charger cable
1x USB AC adapter 100-240V