[Multimedia keyboard with FN function keys] Fn+Sclk= Turn on/off backlit Fn+Page Up= Brightness+ Fn+Page Down= Brightness- Fn+F1 / F2 /F3 = Music/ Volume Down/ Volume Up Fn+F4 / F5 /F6= Mute/ Fwd/ Back Fn+F7/ F8/ F9= Play Pause/ Stop/ Browser Fn+F10/ F11/ F12= Mail/ My Computer/ Favorites [The Mouse keyboard re-matching mode] Keyboard-Press the ?ESC+K?button at the same time until the keyboard indicator begins to flash,then plug in the USB receiver; Mouse-Press the?Scroll Wheel+ Right Button?for 3-5 seconds at the same time [Specification] Product name: LT600 Rechargeable Wireless Keyboard and Mouse Combo System support: Windows XP/vista; Windows7/ 8/10/MAC OS Applicable objects: Home, Games, Office, Notebook Color : Black/White Backlit Language: English (Note:This is an standard English keyboard) Number of keys: 104 keys Keycap type: Floating + Retro key Material: ABS + PC + Aluminum ally Connection method: Wireless Waterproof: IPX5 Photoelectric resolution: Mouse 800-1200-1600DPI Interface type: Shared USB Wireless Wireless band: 2.4Ghz plug and play Battery type: Built-In Rechargeable Battery Keyboard Size : 435x133x26mm Mouse Size : 120x65x43mm Product weight: 650g [What's in the box] 1 * LT600 Keyboard Mouse Set 1 * Charging cable 1 * Manual 1 * Packaging Box [Kindly tips] 1. The 2.4G USB receiver is stored inside the mouse and can be taken out for use; 2. There is a ON/OFF switch at the bottom of mouse,pls turn it on for use; 3. Pls charge the product for 12 hours before first use to activate the built-in battery.