• Crawler Size: 145mm(L)*100mm(W)*68mm(H) • Operating stroke: 20 meters for standard; extendable to 100m • Running method: Dual-Caterpillar driving • Rotating radius: 0 (360° rotation in original place) • Performance parameters: obstacle crossing>45mm; climbing capacity>40° • Travel speed: 0-12m/min (stepless speed regulation) • Video recording and lighting: 520TVL industrial standard color camera, scatter-type high intensity lighting by LED light source of low temperature and longevity • Handheld high resolution 7" LCD Color Monitor w/video & editing • Control box with built in 500G hard drive