Features: LMK21 aluminium numeric keypad; Aluminium coated case in 6063 aluminium material; Support typeC, 2.4G wirelessly, Bluetoothcompatible connection; With backlighting low light, support customisation; Kaihua hot-swappable shafts,support 3pin and 5pin mechanical shafts body; TypeC rechargeable, builtin 1000mah battery; support multiple system Specifications: Item: LMK21 Wirelessly Keyboard DIY Kit VIA Programmable Key Number: 21key Support: TypeC；2.4G; Bluetoothcompatible connection; Support: South-facing Backlighting Material: Aluminium Cable length: 1.5 metres Size：about 14.5x9.5x3.7cm/5.71x3.74x1.46in Package Includes: 1Set LMK21 Wirelessly Keyboard DIY Kit note: Due to the different monitor and light effect, the actual color the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring difference due to manual measurement.