with 1.5M USB cable, driver free, plug-play, easy to use. Multi-color RGB lighting effects make your keyboard unique and easy to switch to meet your needs. Adopt high quality PBT-keycaps design, sensitive typing, reduce errors and feel comfortable. Dye-sub keycaps and character spacing improve speed and accuracy, and are easy to locate and press the number you want to find. Applicable: Suitable for notebook computer users, checkout- counters, -, stock exchanges, etc. Name:Mechanical numeric keypad Number of keys:21 keys Connection:USB Wired Cable length:1.5 meters Lighting type:Color lights (9 lighting effects) Shaft:Green shaft, life expectancy of about 500,000 cycles Colour:Matcha Color Material:Plastic+PBT Size:About 139x87x37 mm Package Contents: 1 * Numeric Keypad Only the above package content, other products are not included. Note: Light reflection 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.