High-quality industrial-grade manufacturing, compatible with brand receivers, The antenna can be used with a variety of satellite navigation receivers and is widely used in geodetic surveying, waterway mapping, precision agriculture and the sea measurement and other fields can also be applied to the military field according to application conditions. Product features: 1. Using multi feed point design to ensure the superposition of phase center and geometrical center which could minimize the influence of measurement error to lowest range 2. High gain of the antenna element and the direction map beam width to make sure the receiving satellites performance of low elevation mask 3. Resistance multipath effects board inside could reduce the measurement error caused by multipath 4. Water proof, shock proof and lightning resistance Survey antenna is the traditional RTK product standard antenna, can be widely used in land survey, marine survey, channel survey, seismic monitoring, bridge survey, container operation, etc. This product is a complete set of sales containing: GNSS antenna TOP106 :1PCS !!! Please contact us if you require a larger quantity we will reply in 24 hours. !!! Shipping 1.If you need to buy in bulk, please contact, we will reply in 24 hours. 2.We are always working hard to ensure your package arrives as soon as possible. Please understand that some factors like weather, high postal traffic, and the performance of shipping companies are outside of our control. 3.Usually product Reaches after about 12-45 business days depending on destination. If you have not received your shipment within 45 days from payment, please contact us. We will track the shipment and get back to you as soon as possible with a reply. Refund or resend product will be offered if item still not received. 4.We maintain high standards of excellence and strive for 100% customer satisfaction! Feedback is very important. We ask you contact us immediately BEFORE you give us neutral or negative feedback, so that we can satisfactorily address your concerns. It is impossible to address issues if we do not know about them! THANK YOU :)