This is my third purchase of this product, the first 1 was the cheapest with white rubber material covering the indicator flashing section. This rubber deteriorated after a few scuffles. The second was magnetic version which had no rubber and was a lot more sturdy and robust, but a little heavy hence I lost 1 indicator while riding as it was not screwed on properly and due to the weight of the magnet fell off of course it was my fault for not checking before hand. The third is the 1 I have now which is by far the best yet no magnets on this version but has side lights as well as indicators which help a great deal one draw back is having to use my pinky finger to operate would prefer a thumb switch.