... for road, engineering, telecom prepairment,traffic accident, vehicle problem. Working temperature: -10-- +60 °Cpolymer lithium battery: 7.4V; 2000mah 7.4V1000mah ... , adopts no- touching charging method.The light source is brightest LED, 1WColor: red/amber/blue/whiteThe light can load 30 tons ... weight, suitable for bad weather or at night LED road block light