<p><b>Specifications: </b><br> Frequency range: 125-525 Mhz <br> Center calibrated: 145Mhz(VHF) 435Mhz(UHF) <br> Power range:0-120W +/- 5% <br> Impedance: 50 ohm <br> Connector: M-J(So-239 (M)) <br> Dimension: 70W x 78H x 30D mm <br> Net Weight: 220g<br> <br> <br> <b>Measurement:</b><br> 1. Apply output of transceiver to "TX" and antenna or load to "ANT". <br> 2. "POWER" on for ready to use. <br> 3. LCD display show simultaneously "Fwd/Ref Power and SWR". <br> 4. For back-light, please switch "LIGHT" to "ON". <br> 5. No function in 30 seconds, the backlight will automatically off. <br> 6. Once PTT launched, the backlight will be back. <br> <br> <b>Battery installation:</b><br> 1. Remove the black screw from the cover to open the rear panel. <br> 2. Install 2 pcs "AAA" batteries. <br> 3. Can be used with alkaline or Ni-Ca, Ni-MH rechargeable battery. <br> 4. This unit has no built-in charging circuitry. <br> 5. Be sure to correct polarity of battery. <br> 6. Remove the battery if the unit won't be used in long period. <br> <br> <b>Packages includes: </b><br> 1 x SWR/Watt Meter(no batteries) <br> 　</p>