From the manufacturer's official website:

Ergonomic innovation is probably more critical to the higher standard of the new 10-speed S.T.I. levers than the added gearing.

The narrower cradle-style perch welcomes the high-on-the-hood riding style and accommodates all sizes of hands.

The shift internals borrow the robustness from our MTB technology which results in a smooth and effortless shift.

Features:

• Ergonomic design: Refined lever hood for improved ergonomics.
• Robust internal mechanism
• Same lever response as Dura-Ace
• Ergonomic shift stroke movment
• Effortless shifting: Shift effort is reduced on release lever.
• Short stroke shifting: Inward shift stroke distance is reduced by 10mm.
• Weight:490g(pair)

Specifications:

• Rear 10-speed
• Front double
• FLIGHT DECK SM-SC70 Gear Sensor:Yes
• Max. Single-Stroke Shifts
• 3 (rear)
• Handle Bar Diameter 23.8-24.2mm
• Bracket engineering plastic
• Levers aluminum/ clear coated
• Super SLR Yes
• Shift Cable Casing SIS-SP41
• Shift Cable stainless
• Average Weight 490g(pair)

For more information, please visit this product's webpage.