Free sample OK,OEM service provided

Feature:
With optical tracking engine
With plug-and-play function
No driver is required
With scroll without needing scroll bars
With ergonomic design reduces fatigue effectively
Supports USB interface
Key lifespan: 3,000,000 times
Suitable for desktop computers and laptops
Available in various sizes, logos, colors and packing ways
Compatible with Microsoft Windows 95, 98, Me, 2000, 7, NT, XP, Vista and 7
Order quantity: 2000 pieces (minimum)
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