Buttons Description: button: controls the rotation of the equatorial declination . When N is pressed, declination always move towards the north celestial pole. This button is the page up button in the menu. E/W button: controls the rotation of the equatorial right ascension . In the menu, W is the confirm button and E is the return button. Center button: click on the main interface to switch between displayed information, long to enter the main menu, double-click to set the function of F1/F2 buttons. Function Keys: F1/F2 buttons: F1 is for decrease, F2 is for increase, usually used to adjust manual control speed. Pressing F2 can increase the speed of the equatorial when using the directional keys. LED key: and hold the LED button to turn on the red LED light at the top of the handle, which is used for auxiliary lighting in the dark. Color: Black Material: ABS Package Contents: 1 set * Smart Hand Controller (SHC) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.