Features: Ergonomic Design: left-hand keyboard adopts an ergonomic design, effectively relieving right-hand fatigue, reducing work of right-hand fingers, and improving computer operation efficiency. Full-size Keyboard: full-size left-hand keyboard includes all common key positions, adapting to various input needs. Dual USB Interface: It has dual USB HUB functions and a USB interface, which can more devices and is more convenient to use. Improve Work Efficiency: When using left-hand keyboard to input numbers, it can solve problem of frequent switching between keyboard and with right hand, and work efficiency is increased by more than 20%. 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 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* Left-hand keyboards Ergonomic Design: left-hand keyboard adopts an ergonomic design, effectively relieving right-hand fatigue, reducing work of right-hand fingers, and improving computer operation efficiency. Full-size Keyboard: full-size left-hand keyboard includes all common key positions, adapting to various input needs. Dual USB Interface: It has dual USB HUB functions and a USB interface, which can more devices and is more convenient to use. Improve Work Efficiency: When using left-hand keyboard to input numbers, it can solve problem of frequent switching between keyboard and with right hand, and work efficiency is increased by more than 20%. Widely Applicable: Suitable for software designers, engineers, banks, offices, finance, stocks, and markets with demand.