Description: 3 Modes ConnectionWireless Numeric Keypad supports three connection modes, wired, 2.4G and BT connection, easy to use.18 Kinds of Lighting EffectsKeypad has 18 kinds of lighting effects, which can be switched at will. The light shines through the transparent shaft and keycaps to create a cool and fashionable atmospherePremium MaterialTransparent mechanical keyboard is made of PC material, transparent shaft, transparent keycap, comfortable touch, shock absorption and sturdy.Hot SwappablePC Transparent Numpad adopts full key Hot Swappable design, supports most triangular and five pin mechanical shaftsEasy to UseTransparent Tri Mode mechanical numeric keyboard, sensitive touch, with USB cable, rechargeable. Small and portable, suitable for home and office use. Specification: Material: PCConnection: Wired/2.4G/BT3.0/5.0Interface type: Type CCharging current: 450mANumber of keys: 21 keysBattery capacity: 500mAh Size Chart: 12cmx8.3cmx3.6cm/4.72inchx3.27inchx1.42inch Package Includes: 1x Keyboard1x Instruction Manual Note: Please allow slightly errors 1-2cm differences due to manual measurement.