How does Cobos sweeping robot unlock children?

Now the child lock function of the machine has the following unlocking methods:

1。 Unlock with menu key: press the "menu" key (or "FUNC" key) to select the function display menu (system setting menu), and there is a child lock in the submenu. Press P /- to move the cursor to the word "child lock", and press V /- to set the child lock to "off", that is, turn off the child lock function;

2。 Press the screen key to unlock: after the machine is locked, there is no lock sign on the screen, but when the screen key is pressed, the program number is red. The unlocking method of this machine is simple: press the "Display" key (channel number display key) on the remote controller for more than 3 seconds (or 5 seconds), and the program number displayed on the screen will change from red to green to unlock.

3。 Password unlocking: press the "lock" key or the child lock key, then enter the 4-digit password you set, press P /- to move the cursor to the word "child lock", and press V /- to set the child lock to "off", that is, turn off the child lock function. The initial password of the factory is 0000.