Designed for all gate automation control panels or receivers. Increasing range of transmitters with 433.92 MHz up to 250 meters!!! Frequency: 433.92 MHz 433 MHz : Screw (wall) Bandwidth (MHz): 10 VSWR less than or equal to 1.5 Gain (dBi): 3 Maximum input power (W): 20 Input impedance (ohm): 50 Polarization: Vertical Cable type: RG174 Impedance: 50 Ohm Stainless steel bracket Color: Black Material: plastic + metal Size: cable length: about 2 meters, antenna length (mm): 250 Package Contents: 2 x Antenna 2 x Metal Wall Mount Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.