... powful cost low, good quality and b 2.4G wireless optical MouseFirst ,the product descriptionThe 2.4G cordless products, transmission range of up to ... 8M, a extremely small delay. Second, to achieve functional1. For yardsBe ... watch DPI value, DPI LED flash DPI for low-DPI = 1000, slow flash DPI for high-DPI = 1600, only when the ...