USB operating voltage: 4.5 V-5.5 V Ambient temperature: -40 °C - + 70 °C Operating temperature: -50 °C - + 80 °C Operating life: more than 10 years System operation: Win98/ME/2000/XP/Vista/7, operating system 9 Lighting, anti-magnetic effect and 3 meter range. Using a chipset that can be repeatedly tested for 100,000 times. Compatible with PC, portable. Interface: USB 2.0
