Nanjing Haoce Surveying Instrument Co.Ltd. We began survey instrument business since 2010. As the agent of CHC and South and Hi-Target in JiangSu province for survey instruments, we can give you the rock-bottom price and best service. We supply you with Gnss RTK, auto level, theodolite, total station, 3D scanner, rotary laser, tripod, prism, prism pole, prism group and so on. At the basis of Foif total station, we can accept OEM. Our warranty policy is as followed. For instruments(total station, thedolite, GNSS, auto level), we offer one year warranty, for accessories(prism, pole, tripod, leveling staff), we offer six months warranty from the day you get the products. For product within the warranty period, please send us photos to show the problem. And then we will decide to send you parts or you send the instrument back to us to repair. Please make sure to contact us first instead of sending the damaged parts direct to us. For problem out of the warranty period or warranty lialility, we will judge the problem and quote for you.