1. Size:  3*7cm

2. Material:  silicone+abs plastic

3. Battery: 1 x  CR2032 included for red light;

                2 x CR2016 included for green ,blue light;

4. LED Light:single red/blue/white/green etc;

5. Logo: customed logo printing

6. Accessory: elastic string;

7. Switch: press button on/off

8. 3 Flashing models

    flash-constant-off(change mode by pressing the ON/OFF button)
Function:it's a personal safety light and keep you safe when bike at night;