Good satellite signal reception GNSS multi-star multi-frequency helical antenna, using multi-arm coupling and four-feed point feeding technology, supports L1 and L5 dual-band satellite navigation signal reception of Beidou II, GPS, GLONASS and systems Built-in low-noise amplifier, multi-stage filter, good out-of-band suppression, strong anti-interference ability, ensuring normal operation in harsh electromagnetic environments Meet the current needs of multi-system compatibility and high-precision measurement Small size, easy to carry and install Antenna structure: four-arm spiral structure Supported satellite signals: BEIDOU: B1/B2a; GPS: L1/L5; : El/E5a; GLONASS: L1 Maximum gain: equal 0 dBi Polarization: right-hand circular polarization (RHCP) Antenna axial ratio : less than equal 1.5dB Horizontal coverage angle: 360° Characteristic impedance: 50 ohm Colour:Black Material:ABS+PC Package Contents: 1 x GNSS Antenna Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.