Anself 390MHz Antenna for Garage Door Gate, Extend to 250 Meters

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 of transmitters with 390mhz to 250m. Wide 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 antenna, it is necessary to remove one and then install our antenna. If antenna is directly connected, it will not be effective.