Features: Ergonomic Design: The lefthand keyboard adopts an ergonomic design, effectively relieving righthand fatigue, reducing the work of righthand fingers, and improving computer operation efficiency. Fullsize Keyboard: The fullsize lefthand keyboard includes all common key positions, adapting to various input needs. Dual USB Interface: It has dual USB HUB functions and a USB micro interface, which can connect more devices and is more convenient to use. Improve Work Efficiency: When using the lefthand keyboard to input numbers, it can solve the problem of frequent switching between the keyboard and the mouse with the right hand, and the work efficiency is increased by more than 20percent . Widely Applicable: Suitable for software designers, engineers, banks, offices, finance, stocks, and markets with demand. Specification: Material: ABS Color: Black Number of keys: 109 keys Interface: 2*USB micro socket Key life: More than 10 million times Cable length:1.45M Product Size: 463*137*23mm Product weight: 475g Package Size: 550*167*50mm Package weight: 635g Package List: 1* Lefthand keyboards Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.