Cellphone-Mate N male to SMA male Check out your antenna / amplifier specifications or packaging to find out the correct connector parts for installation. This is an N male to SMA male radio frequency adapter. Check this out: [ VERY USEFUL SIGNAL CALCULATOR ] & [ FAQ A.G. AMPLIFIER'S GUIDE FOR NEWBIES ] Cellphone-Mate N male to SMA male feature Make: Cellphone-Mate Part Number: CM-CN-05 Description: N male to SMA male RF Adapter Electrical Specifications Impedance: 50 Ohms Frequency Range: DC ~ 11 GHz Voltage Rating: 500 Volts Peak Dielectic Withstanding Voltage: 1000 Volts RMS Insertion Loss: .15 dB Max. Material: Nickel plated brass *Life Time Warranty available with Cellphone-Mate Cellphone-Mate N male to SMA male