Introduction:

1. The frequency meter capable of measuring the parameters of the frequency of the continuous carrier signal walkie-talkies, with signal strength indicator.it is the tool of choice for maintenance personnel, test frequency and signal strength of wireless enthusiasts.
2. This portable frequency counter is designed for counting continuous wave signal comes from Two-way Radio. 
3. There are easy ranges for you to choose. The ranges cover most of the frequency of the two-way radios you want to measure. 
4. Its four-button control is easy to use and its small size allows you to carry it anywhere you like.
5. Work by TCXO (Temperature Compensate X'tal (crystal) Oscillator), In the range of -45 ℃ ~ 65 ℃ can reach ± 2 ~ ± 4ppm accuracy.
6. This includes very interesting frequency areas such as 2m HAM radio, all VHF and UHF
7. DMR Radio signal e frequency counter.
8. Easy Battery level 
9. digital mode for DMR radio only, not for other digital device.

Feature & Specification:

• Frequency range: 27Mhz-3000Mhz

Note: (27MHz to 100MHz It cannot not be guaranteed and the corresponding normal emission appliance)

• CTCSS/DCS Decoder (must be 136-174/400-520MHz)

• Frequency counter for DMR radio
• Frequency digital 0.000 or 0.0000 ( +-0.001)
• Work by TCXO(Temperature Compensate X'tal (crystal) Oscillator) 2～2.5ppm
• Frequency Response time:  0.2-0.5sec.( CTCSS/CDCSS >0.5-1sec) 
• TFT Color Display 240 x 320, LCD Dim level setting
• Build-in Li-ion battery.
• Net Weight: 113g 
• 4 buttons control
• Auto power off 1-9minutes   
• Charging battery LED indicator  

Package Contents:

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