SINCETOP Multimedia 2.4GHz Wireless Pro Gaming Keyboard and Mouse Combo for Desktop PC Laptop (White and Blue) 19 keys with no breakthrough,USB wireless receiver is in the back cover of the mouse,For connect the the Wireless Keyboard and Wireless Mouse 10 Combination by Multimedia Keys:Apply to more areas, game playing fired. Listening to music is so easy and quick keys entertainment easier 1000/1600DPI Customize DPI Switch [Mouse]6D Multi-function Keys:6 buttons with scroll wheel (Two Side-Buttons, One DPI Switch)High-end optical engine, Super Laser, Fast and Precise Positioning Here are keyboard solutions you may have a try. 1. Have silver/aluminum foil rolled and placed in front of the positive ends of the battery between the battery and the terminal on the keyboard. Wait for a while, try the keyboard again. 2. If it doesn't help, pls try the instructions below. Step 01, Take off the Nano. Step 02, Press "ESC" and "=" ( about 3 seconds  Step 03, put the Nano in, try the unit again.