Specifications:

Bands: 144/440 MHz
Gain dBi: 2.15dBi (144MHz) / 4.9dBi (440MHz)
Max Power Rating: 50W FM (Total)
Height: 27.5"
Weight: 133g
Mount: UHF
Element Phasing: 144MHz -1/2l Radialless, 440MHz - 2x5/8l Radialless
VSWR: Less than 2.0
Impedance: 50 ohms