K680 Wireless Rechargeable Keyboard and Mouse Combo Removable hand rest is born for Gaming. The High Performance ensure you faster and stronger during every competition. The ergonomic design makes you more comfortable during long time gaming. Keyboard Specifications: ① Normal Keys: 104 ② Keyboard Dimensions: about 455*175*45mm ③Interface Type: Usb （2.4GHz wireless connection） ④Built-in battery capacity：3000mAh ⑤ System Support: Windows 7 / 8 / 10 / Vista / XP / Mac OS / Linux and Latest ⑥Light effects: Rainbow LED backlit FN DEL: Three backlight state switches (Standard Light - Breathing Light - OFF) FN + ↑/↓: Enhance/reduce backlight brightness FN + ←/→: Speed up / Slow Down the backlight of breathing light speed Mouse Features: ① Mouse Dimensions:125*65*40mm ② Customize DPI Switch: 800/1200/1600/2400DPI. ③ Built-in battery capacity: 800mAh ④ Light effects: Seven color breathing lights (Mouse backlight color Can Not be adjusted) ⑤ Buttons: 6 buttons with scroll wheel (Two Side-Buttons, One DPI Switch) Note: 1. Before the keyboard is used, turn the switch on the side of the keyboard and the bottom of the mouse to the ON position. 2, The keyboard and mouse share a receiver, the receiver is at the bottom of the mouse 3. When the mouse snake head light is dimmed or off, you need to charge the mouse. When the LOCK light on the keyboard is flashing, you need to charge the keyboard. 4.The keyboard and mouse are charged using a DC power supply of 5V. Packing Included: 1x Gaming Keyboard and Mouse Set (Retail Package) 1x Charging Cable 1x Removable Hand Rest 1x Instruction User Manual