... design, Shockproof, damp proof and suitable to fieldwork-Lithium battery inside and more than 10 hours working time- ... And also All events are also listed screen includes NUMBER. TYPE, DISTANCE, LOSS, REFLECTION, TILT (ATTENUATION), TOTAL LOSS. ... PC InterfaceUSB(Principal and subordinate each) /SD/RJ45 Battery Rechargeable Lithium battery inside(charging <4hours,working time>10hours) Power supplyAC ...