see U / Injection needle

Let's see 'used'. 'see U' injection needle design is one that tells intuitively whether it had been used before or not. First is hearing the sound of opening the cover. It is able to understand that it is a new one by hearing the sound associated with the opening of the cover of 'see U'. Second one can observe the red letters marked 'used'. After lowering the cap, it is able to see the words 'used' in red letters on white background. Because person's blood wet on the letters 'used' inner of 'see U'. Through means, we can prevent the reuse of an injection needle and wipe away the concerns about an infection of Hepatitis through the 'see U'.