Pesp 7-color Incoming Call Sense LED Flash Light up Protective Case for Apple Iphone 5 5s (Dragon) Through the phone's LED flashes optical refraction occurs, triggering flash pattern occurs principle This light can be changed to 7 different color when you rotate the black ring on the back of the case The slim appearance, stylish design and beautiful frame color make your iPhone even more attractive Phone shell made of high quality transparent PC material, silicone & tpu. The case CAN NOT light up, the light is come from the LED light and flashing of your iPhone and colored rim