2.4Ghz wireless optical mouse:1. Ergonomic shape 2. 1 year warranty 3. ABS + PC material4. Scroll wheel with middle button5. Size: 18�4.5�.5mm6. Resolution:500/1000CPI(adjustable)7. Detection speed: up to 14inch/s, 8G acceleration8. Factory direct offer, perfect quality and short lead time and low price