... capability, automatically recover the insensible area;3, Adopting infrared positioning technology, which is more durable than the Electromagnetic ... whiteboard. Tightened inspection to guarantee the quality of each infrared senders and receivers;4, Intelligent postil, quick switch, ... .6V-DC5 V, USB power supply.Working current: <200mAWorking temperature: -10°C ~ 50°CWorking humidity: 20%-85%PC interface ...