1、Three Functions: This SWR power meter is used for SWR, RF and field strength testing, with SO239 connector and frequency range of CB 27 to 30MHz. 2、Main Usage: This digital SWR meter can indicate the condition of the 50 ohm antenna and coaxial cable used for CB operation. 3、10W 100W Power Range: The power test meter can test 0 to 10W or 0 to 100W power, with a convenient switch, easy to operate. 4、Battery Powered: This SWR RF field strength test meter is powered by battery, ensuring long working time, with a compact size, easy to carry. 5、Premium Material: The SWR meter is made from ABS material, which is sturdy and not easily damaged, ensuring durability. Item Type: SWR and Power Meter Material: ABS Model: SW 114 Power Supply: Battery Powered(not included) Power: 0-10W 0-100W Connector: SO239 Impedance: 52 ohms SWR: 1:1 to 3:1 Frequency: CB 27-30MHz (Not Support VHF UHF) Size: Approx. 120x60x65mm / 4.72x2.36x2.56in 1 x SWR and Power Meter 1 x Accessory 1 x User Manual