MFJs Window Mount Clip gets your antenna outside where it can radiate freely takes away the shielding effect of your car and gives maximum radiated power which increases signal strength and signal reception in busy areas. Its firmly held in place when you roll up your window for a super lock tight hold. MFJ-310 works with any 144/440 MHz HT using a SMA connector. Strong metal construction with rubber guarding protects windows and secures. Has 10 ft. flexible mini RG-58 coax.
You can also order this product with a BNC connector as the MFJ-310.