1. all kinds of shape can be available, just like round-headed cylinder, concave cylinder, dome, rectangular and so on. 2. size: ø3mm, ø5mm, ø8mm, ø10mm, 2*3*4, 2*5*7, 4.7*4.8 and so on. 3. flickering frequency diversification. 4. color: single color flicker, bi-color, tri-color flicker and bi-color share with one pin, tri-color share with one pin and so on. 5. it’s been used in indicator light, signal light, decorating light, adverting sign and so on.