... ISO14001:2004 Designated supplier of Chinese police system Roadblock Light Good quality, reasonable price Direct Supplier of CHINA POLICE/Prison ... at night 2. ABS material jacket 3. various of light souce available 1.Jacket with high-quality ABS material, non ... -fade, anti-shock.2. Built-in light sensitivity control circuit, in the light-controlled conditions, automatically shut down during the day ...