1. Material: ABS 2. Width: 3.8 cm 3. Weight: about 96 grams/piece 4. Made of ABS material, sun protection, high temperature resistance, not easy to deform 5. Using magnetic digital card, convenient and fast, stable and not easy to fall 6. Cool luminous display, which can be clearly seen at night 7. Push-type design, can be hidden by one key
