ITEM NAME:10PCS/Lot 433MHZ 3DBI Helical Copper Antenna for Arduino Remote Cont 3C Features: 433M High Gain 3DBI Spring Antenna 433mhz Digital Transmission Antenna Single Spring Tegat 433mhz small stick antenna Parameters: Frequency range Frequency range: 433MHz Bandwidth: -3 MHz Gain: 3DBI Resident ratio factor VSWR: 1.5 Length: 5cm/11CM Interface Form Connector Type: SMA Packaged: 10pcs 433mhz Antenna.433M High Gain 3DBI Spring Antenna 433mhz Digital Transmission Antenna Single Spring Tegat. Gain: 3DBI. 433mhz small stick antenna. Frequency range Frequency range: 433MHz. 10pcs 433mhz Antenna. Resident ratio factor VSWR: 1.5.