Specification: The Excalibur is a Full sized keyboard with 104 keys, which uses MX Blue and Brown switches. The Excalibur keyboard uses a USB connection, with a 1.55m cable. And has 4 levels of brightness backlighting, and is 450 x 145 x 24 mm. K300 MECHANICAL Keyboard: Product model: K300 Product Type: Mechanical Keyboard and Mouse set Product Color: Black Number of keys: 104 keys Key life: about 50 million times Keycap material: matte keycap Panel material: plastic Keyboard wire: plastic wire Keyboard cable length: 1.8 meters Connection port: USB plug and play Keyboard lighting: red, green and blue backlight (click Fn+Ins to adjusted backlights) Keyboard size: 425 * 120 * 30 Keyboard weight: 650g Multimedia keys: 12 groups of multimedia keys Conflict-free buttons: 19 System support: compatible with window2000 / XP / Vista / 7/8/10 Android Linux Apple and other operating systems 📦 Package list: 1 * keyboard Km300 keyboard +mouse 😘😘 If you like us, please give us 5 stars and a good review. 😘😘 If there is a quality problem, please do not click to confirm receipt and evaluation, first contact us, we will have quality after-sales service