4key 2.4GHZ optical wireless mouse , 10 meter operation range, 500/1000dpi SHIFT , Product Description:1)2.4GHz digital wireless transmission, operation distance is up to 10 meters ... hopping 3)Rated operation current: 15mA 1.5v 4)USB: ver.2.0Cautions:1)Operation distance is cloesly related to the environment ... battery into battery recycle bin6)Product size:98×55×32MM 2.4Ghz WIRELESS MOUSE