Patent: USA, Germany, Taiwan, China. Function: Glass Knocking, Seat Belt Cutting, Lighting in dark area for Help, Whistle for drawing attention. Feature: Keep you safe in car accident, emergently knock window in fire building
Patent: USA, Germany, Taiwan, China. Function: Glass Knocking, Seat Belt Cutting, Lighting in dark area for Help, Whistle for drawing attention. Feature: Keep you safe in car accident, emergently kno