Usage is as follows: 1 Pass the safety belt through the safety buckle, fasten the safety buckle and pass the safety belt through the zipper. 2. Adjust the seat to a horizontal state. 3. Adjust the seat to the highest state. 4, fasten your seat belt, make sure the seat belt has been buckled. 5. Turn on the power switch at the back of the seat, and the power indicator lights up, indicating that the power is on.