Install steps: 1.Please charge battery at least 8 hours before first-time use 2.Turn off power switch before charging. Charging indicator shall lights on RED when charging the battery, the indicator will turn to GREEN color while finished 3.Please install antennas and tight up according to the number indicator 4.Turn on the power switch and the Power LED shall light in Green and the LED of each band will turn on too(default ),by dip switching ON →OFF, each band could be disable.The corresponding LED indicator shall be turn off 5.Don’t suggest to use while charging, otherwise the machine will be damaged, because temperature may too high about 75°C