SURECOM SW-33 markII 125-520 Mhz Mini Digital VHF/UHF Power & SWR Meter for Walkie Talkie for Two Way Radio   Features: 1 VSWR. Forward power direct digital readout, without any calibration. 2. Maximum measurable power range up to 100W. 3. 3 seconds check your antenna SWR , also check your radio RF power watt. 4.Easy to install handheld Radio Specifications: Measurable power range: 0.1-100W Maximum power: 100W Accuracy: mean / – 5% * Not for the DMR digital radio. Specifications: MAX. Power in：100 WATT V.S.W.R：1.00~19.99 Frequency Range：COVER:125MHz~525MHz Insertion Loss：< 0.15dB(VHF) , < 0.25dB (UHF)Temperature：0℃~70℃ Battery Build -in：Li-ion Battery Size(WHIT OUT SMA：25*25*60 (mm) Power in：5V (micro usb) Interface (in and out )：SMA female Impedance: 50Ω Weight：160g Package Contents 1x SW-33 markII SWR/POWER METER 1x English User Manual 1x USB charger cable 1x USB AC adapter 100-240V 1x SMA male to SMA male Adaptor 1x SMA male to SMA female Adaptor 1x SMA female to BNC female Adaptor 1x SMA male to BNC male Adaptor 1x 5W DUMMY LOAD for testing / other type of 5W dummy load for testing (random)