Product: Youmei RS-50 Digital SWR/Watt Meter VHF/UHF 125-525MHz 120W for Two-Way Radio
Brand: Youmei
Specifications: 
 Frequency range: 125-525 Mhz 
 Center calibrated: 145Mhz(VHF) 435Mhz(UHF) 
 Power range:0-120W +/- 5% 
 Impedance: 50 ohm 
 Connector: M-J(So-239 (M)) 
 Dimension: 70W x 78H x 30D mm 
 Net Weight: 220g
 
 
 Measurement:
 1. Apply output of transceiver to "TX" and antenna or load to "ANT". 
 2. "POWER" on for ready to use. 
 3. LCD display show simultaneously "Fwd/Ref Power and SWR". 
 4. For back-light, please switch "LIGHT" to "ON". 
 5. No function in 30 seconds, the backlight will automatically off. 
 6. Once PTT launched, the backlight will be back. 
 
 Battery installation:
 1. Remove the black screw from the cover to open the rear panel. 
 2. Install 2 pcs "AAA" batteries. 
 3. Can be used with alkaline or Ni-Ca, Ni-MH rechargeable battery. 
 4. This unit has no built-in charging circuitry. 
 5. Be sure to correct polarity of battery. 
 6. Remove the battery if the unit won't be used in long period. 
 
 Packages includes: 
 1 x SWR/Watt Meter(no batteries) 
 　
Forward/Reflected/VSWR ration in one push button
LCD backlight display for easy reading
Convenient control layout for easy operation
Powered by two AAA batteries/rechargeable batteries or external USB port
Low insertion loss(0.3dB or lower) structure allows it to be connected permanently

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