The PolyTac 90X USB is a 500 lumen tactical light that can use either a proprietary Streamlight Li-Ion USB rechargeable battery pack or two CR123A disposable batteries. The PolyTac 90X USB is a complete rechargeable system that comes with a charge cord and a Streamlight Li-Ion USB battery that features an integrated micro-USB charge port. In use, the colored LEDs in the button show battery power remaining. Green, yellow, red and blinking red when charging or changing cells is needed. The glass filled nylon housing makes the light extremely durable and abrasion resistant. Available in Black, Yellow and Orange.