Extendable 390MHz External Antenna for Garage Gate Remote Control 250 Meters Range 6.56ft Cable Length Features： 1、External antenna for Appliances Gate Garage Door for 390mhz Garage remote Signal enhancement antenna Professional seller. 2、Designed for any gate automation control boards or receivers. 3、It is applicable to all 390mhz remote control extension distance. Increasing range of transmitters with 390mhz up to 250m. 4、Wide range of uses, garage doors, Electronic gates, Barrier gates, sliding doors, automatic doors, rolling doors, shutters.?Electrical appliances/Home automation i.e.lights, Alarm system, access control system. 5、When connecting the antenna, it is necessary to remove the original one and then install our antenna. If the antenna is directly connected, it will not be effective. Specification： Features: External antenna for Appliances Gate Garage Door for 390mhz Garage remote Signal enhancement antenna Professional seller. Designed for any gate automation control boards or receivers. It is applicable to all 390mhz remote control extension distance. Increasing range of transmitters with 390mhz up to 250m. Wide range of uses, garage doors, Electronic gates, Barrier gates, sliding doors, automatic doors, rolling doors, shutters.?Electrical appliances/Home automation i.e.lights, Alarm system, access control system. When connecting the antenna, it is necessary to remove the original one and then install our antenna. If the antenna is directly connected, it will not be effective. Specifications: Item: 390mhz External Antenna Main Color: Black, Silver Material: ABS & Metal Frequency:?390mhz Mounting: Screw (Wall Mount) Cable Length (m): 2M/78.7inch/6.56ft Bandwidth (MHz): 10 VSWR ≤1.5 Gain(dBi): 3 Max Input Power (W): 20 Input Impedance(Ω): 50 Polarization: Vertical Antenna Length (mm): 250 Cable Type: RG174 Impedence: 50 Ohm Bracket made from stainless steel Package Size: 31.5*8.3*2.5cm Package Weight: 120g Package List: 1* Antenna 1*Metal Wall Mounted Base 2* Screw Package List： 1* Antenna 1*Metal Wall Mounted Base 2* Screw