The antenna is small, rugged and durable. The shell is made of ABS plastic, the bottom plate adopt aluminum alloy castings. Frequency: 865-868MHz, 902-928MHZ ( can be customized) Input Impedance: 50 Ohm load Antenna connector: SMA antennas connector or can be customized. Gain: e5.5dbi Polarization: Circularly polarized Dimension: 132* 132* 18mm Weight: 370G