What Frequency specifications do you choose we will ship, please don't choose wrong, if you are not clear, please contact customer service. The connection price is 1PCS, choose the length you want Antenna performance index parameters: Model: GT-7702 Antenna length: 20-40 cm (optional) Frequency :433MHZ (other frequencies can be determined) Gain: 10 dbi Polarization: vertical Standing wave ratio: ≤1.5 (SMA) Connector type: Standard with SMA internal thread internal needle Nominal impedance: 50 Ω Maximum power: 15W Operating temperature :-40℃~+85℃ Soft antenna features: high gain, good effect, bendable imitation collision, bending will automatically straight