Features:
1) Power readout directly in digital form without any calibration.
2) Maximum measurable power range up to 20W.
3) Check your Radio power output watt radio frequency under a second.
4) Easy connection with handheld Radio

Specifications:
Measurable power range: 0.1-20W
Maximum power input: 20W
0-10W (Measuring can not be continue for more than a minute )
10W-20W (Measuring can not be continue for more than a 30 second )
20W or more (Measuring can not be continue for more than a 5 second )

Caution :
RF power over 20W may damage the 50 Ω dummy load.
Metal body is heated while working.

Specifications:
POWER METER Specifications:
MAX. Power in20 WATT
Build-in Dummy Load 50Ω 20W
RF Power in Range 100-525MHz
input resistance 50Ω
measurable 0.2 ~20W

FREQUENCY COUNTER
Frequency counter Range20.000MHz~999.99MHz
Build-in : Detect RF input
Antenna in : SMA male antenna
Display20.000-999.99MHz

Features Specifications:
Work temperature-20℃~+60℃
Battery Build -inLi-ion Battery
Size(with OUT BNC /SMA) 25*25*87 (mm)
SIZE ( with BNC/SMA socket) 25*25*115 (mm)
Power in 5V (micro usb)
Weight 94g

Features function
Hold the red button for only 2 seconds then let go
Hold red button -" Power on " and "Frequency counter "mode
Push red button -" Power Meter "mode
Push red button -" Signal Level "mode
Push red button -" Battery Level "mode

Package Includes :
1x SF-20 POWER METER / FREQUENCY COUNTER
1x English User Manual
1x USB charger cable
1x USB AC adapter 100-240V