Tesla RoboStar W20 Manual page 5

Dear customer,
thank you for choosing TESLA RoboStar W20.

open the battery cover on the bottom of the device and insert 2 AA
batteries inside (not supplied) - make sure that the batteries are
correctly polarized
 place the virtual wall to where you want to use it, for example, to the
door
Example: The robotic vacuum cleaner does not get from the point "A" to the
point "B", the signal transmitted by the virtual wall blocks the passage.

place the machine in the desired locations and move switch "1" to
"Zapnuto/On"

the green indicator light turns on and the device starts to send a blocking
signal

the range of the transmitter is about 3 meters
1 On/Off switch
2 Signal transmitter
3 Battery cover
4 Indicator