Features: 1.Easy to Clean: The spring antenna steel ring, the spring signal is super strong, the antenna base and the antenna rod can be disassembled for easy cleaning. 2.SMA Inner Needle Interface: Omnidirectional high gain antenna reduces co channel interference, strengthens signal gain, and improves transmission performance. 3.High Accuracy: Accurate steel coil spring, fast data reception, high gain, large range, the more open the distance, the farther. Copper is wear resistant and corrosion resistant. 4.Magnetic Design: A magnet is attached to the base, and the magnetic chuck is convenient for fixing and can be adsorbed on metal objects. 5.Wide Range of Applications: GSM/2G/3G/wireless modules, NB‑IOT modules, DTU modules, advertising machines, numbering machines, vending machines, GPRS signal reception/transmission, etc. Specification Item Type: Antenna Model: XP-GSM-004 Material: Copper + Steel Line Length: Approx. 3meters/9.8ft Line Type: RG174 Line Working Frequency: 824-960/1710-2170MHz Antenna Gain: 5dBi Standing Wave Ratio: ≤1.5 Impedance: 50Ω Polarization Method: Vertical Polarization Maximum Power: 50W Antenna Interface: SMA Inner Screw Inner Pin Working Temperature: -40℃~+85℃ Purpose: Signal Transmission and Gain Applicable Equipment: GSM 2G 3G Wireless Module, NB-IOT Module, DTU Module, Advertising Machine, Numbering Machine, Vending Machine, Gprs Signal Receiving Transmitting, etc. Package List 1 x Antenna