Features：Luminous efficiency We choose new high-efficiency solid light source with long operation life, low consumption and energy saving. It’s available in various situations. The 4TH green environmental protective large power white LED, its effective luminous distance is more than 50 meters. Charging batteryLithium battery has the advantage of no memory, excellent discharging and recharging performance, economic and no pollution.Signal fuctionTwo signal method one is red. yellow. White ,the other is red. Green. White., at customers’ option .Its continued working time is more than 16 hours, and the visual distance exceeds 5000 meters. The white lighting source and warning light source is respectively equipped at the lamp head and end .It can provide the working sites portable and emergency lighting for 10 hours and also can send warning signals to avoid dangers while working.Intelligent protectionThe electricity charging is controlled through a chip which has following functions: overcharge protection，short circuit protection ,revolving light and mutual-locking function. The button switch is easy to operate and switch.. The intelligent charger has display for overcharge &short circuit protection.