Easy to connect:With the upgrade Bluetoooth 5.0 version,faster to switching between A to B or C Device.No longer complain about the boredom of slow switching. Switch lights at will:You can adjust the white Led lights mode by pulling the lever, which is interesting when work. You can also adjust the volume and brightness of the light by twisting the wheels. Built-in hot swap blue switch:The classic typewriter style is integrate with premium hot swappable blue switch keyboard technology. Accelerate the speed of typing and enjoy the "Click"feeling by the old royal typewriter Revisit retro style by modern technology:Our panels are made by aluminum alloy metal electroplated wood grain, mate black pull rods and rollers, and electroplated round key caps. Every detail is perfect to present the retro. More Compatiblity:Compatible with Cellphone,Tablet or laptop with for Android, Windows10, iOS and OS system.You can connect it with desktop PC with USB wire. Colour:black Material:Plastic + Metal Package Contents: 1 * Retro Typewriter Keyboard Only the above package content, other are not included. Note: Light 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.