1200 DPI 3D Fingertip USB Ring Optical Mouse (Black)
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* 1200 dpi high resolution.
* Brand new and ergonomic design.
* Streamline shape, very fashional.
* Hand feeling reduces tiredness effectively.
* An ideal choice for home, office, and travellers as it doesn't require much space to operate and won't interfere with any typing actions.
* Button dynamics pressure : 60g ± 5g
* Operation voltage : DC5V ± 0.5
* Button life span : 3,000,000
* Operation current : < 100mA
* Life span : 100,000 hours
* Mechanical life span : 100Km