The power supply passes the CCC, CE, FCC, UL, ROHS safety testing and certification. 1 power cord + adapter. 2 pairs of cleaning rings (4). 1 extension of 4 meters. 1 manual (or English manual). Wait 20 seconds after starting up until the blue light stop flashing, Then start working. Because the robot need 20sec to detect the glass plane. Binding the safety rope when using, Prevent falling from high altitude. Spray some water on the edge of the Mop when working, will be better effect.