crust:adopts thermoplastic ABS resin,thansparent portion uses imported A S highly transparent resin.Luminated material embeded in the handle, the switch is stepless light adjustment type liminotrons:6LED (highly bright luminotrons) batteries:2Ni-Mhaa600mAn chargeable storage.1.2V it can be permanently used without replacing any part only by putting it in the place with light 8 hours"charging under the sun for illumination of 1.5-2 hours fully charging of the storage batteries for illumination of 4-5 hours Note:1.turn the switch clockwise,do not twist it with force when reach to the end, 2.it can charge the chargeable AA storage battery(NO.5) 3.it should be used at least once per six months.