new gps system cheap bluetooth gps receiver

{"cid":"91193213","title":"Pentax brand GPS 220 Channels RTK GNSS Receiver G5 price","imgUrl":"https:\/\/img.ismap.com\/nimg\/57\/1b\/e740e5264d96e26a3a6068deaf7a-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"Pentax","Model Number":"G5","Minimum Order Quantity":"1pcs","Delivery Time":"3-7day","Certification":"CE","Place of Origin":"China","Payment Terms":"T\/T, Western Union","Supply Ability":"10pcs\/day","Packaging Details":"suitcase and carton","Channels":"220 channels","model":"Pentax G5","GPS":"L1 C\/A, L2E, L2C, L5","GLONASS":"L1 C\/A, L1P, L2 C\/A (M only), L2P","Humidity":"100% Non-condensing","Waterproof\/Dustproof":"IP65 standard","QZSS":"L1 C\/A, L1 SAIF, L2C, L5","SBAS":"L1 C\/A, L5","BEIDOU":"B1 \/ B2"}}

{"cid":"91222737","title":"Land Measurement SOUTH GALAXY G1 RTK GPS Receiver GNSS RTK Base And Rover","imgUrl":"https:\/\/img.ismap.com\/nimg\/52\/8b\/3837abd03ce533aecb0693a2353a-200x200-1.jpg","attrs":{"Price":"$5,300.00 - $5,500.00","Brand Name":"SOUTH","Model Number":"GALAXY G1","Minimum Order Quantity":"1 piece","Delivery Time":"30 work day","Place of Origin":"China","Payment Terms":"L\/C, T\/T","Supply Ability":"1 ~ 30 day","Product name":"RTK receiver SOUTH GALAXY G1 Base and Rover","Customized support":"OEM, ODM, OBM","Channel":"220(standard), 965(optional), 555(optional)","Protocol":"GeoTalk,SATEL,PCC-GMSK,TrimTalk,TrimMark","Static accuracy":"Horizontal: \u00b1 2.5mm + 1ppm, Vertical: \u00b1 5mm + 0ppm","RTK accuracy":"Horizontal: \u00b1 8mm + 1ppm, Vertical: \u00b1 15mm + 0ppm","SBAS":"L1 CA, L4","GALILEO":"E3BC, 35A, E4B"}}