Features: Replaces your old or worn one perfectly:The new dedicated remote is fashioner and sturdy and covers all functions of the machine. Mini size:Easy to grab and control with exquisite appearance and comfortable hold feeling. More stable performance:It can work with longer transmission distance.  Operate easily:No extra programming or Settings, you can use it directly. And special menu navigation key make it direct to access to the digital TV channel. Compatible a lot: Compatible with switch TV 1, 2, 3 MC377LL/A MD199LL/A, Macbook Pro. one remote multiple use. Instructions for use: First make sure that the battery is installed. Use only CR2032 button cells (not included). After installing the battery, press the button. If the screen does not respond, the switch TV's receive light responds (click to blink). Unlocking method: Press the menu button and the left button at the same time for 6 seconds and then release, there will be a successful unlocking symbol in the upper left corner of the screen. Specifications: Model: Remote controller Color: Silver Material: ABS Scope of application: switch TV 1, 2, 3 MC377LL/A MD199LL/A, Macbook Pro Package Size: Approx. 12 * 3 * 0.5 cm / 4.72 * 1.18 * 0.19in Package Weight: Approx. 18g / 0.63oz Package List: 1 * Remote Controller Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.