BHCnav K20B is designed with a new generation of GNSS chip, which can support Beidou, GPS, GLONASS single or combined positioning, and satellite positioning is fast and reliable; Open map architecture, built-in national map, support user self-made vector map, satellite image and various grid maps; 2.2 "semi-reflective and semi-transparent color display screen, which can be clearly displayed in the sun, has better resolution than similar products, and the picture is exquisite; Support lithium battery and AA battery power supply mode, suitable for long-term work in the field; The product is exquisite, three-prevention design, easy to carry and safe to use.