1 touch points:1,2,4,6,10,16-touch 2 outdoor & indoor usage 3 water-proof, ... No touching tools,no special touching pen is required,only your fingern Compatible with many operating systems,intelligent switching n Among winXP,win7 ... to +5.25VPower SupplyUSB, power ripple max.200mV rmsPower<2W, operating current<200mAAgency ApprovalsCE, FCC Class BOperation current<180mAUSB Connector Cable ...