This antenna will take care of the electromagnetic waves providing you the picture-perfect display. Made of sturdy and reliable content it is sure o aid you for years. It is resistant to the ravages of time and weather as well. Product Features: VHF 6225 phase III no cable antenna Silver-plated outer conductor copper inner conductor Stainless steel mounting sleeve The connection is an SO239 which uses a standard PL259 connector Suggested mount: Shakespeare Style 4187-HD Ratchet Mount Max power input: 150 Watts SWR: less than 1.5:1 at 156.8 MHz Bandwidth: 3 MHz within 2.0:1 VSWR Frequency: VHF marine band DC grounding: yes Manufactured by Shakespeare ANT Electronics accessories Electronics Dimensions: 2 H x 95 W x 2 D Material(s): stainless steel.