RFID technology combined with twelve national character, with native queries, programmable, intelligent navigation meter reading function has Chinese auto navigation, reminders, sound and light tips and other functions, FLASH memory 4MB of memory, 160 * 128 dot matrix LCD display, Exclusive use of the internal structure of the circuit board embedded in contoured plastic guts integrated design, ultra-low power circuit design alloy casing nanometer process, oxidation resistance, corrosion resistance, waterproof / drop resistance / anti-sabotage. Dimensions: 13.1 * 5.8 * 2.5cm weight: 257g Material: Alloy