Operation
1.
Insert or change Batteries:
Two AA batteries power the Q Set Aviator.
①press from the base of the triangle on the cover,
see Figure 1;②push the cover out of the safety
lock, see Figure 2;③tilt the end of the cover up and
remove the whole cover; put the batteries in;④put
the cover latch into the notch and push it back, see Figure 3.