ABS plastic; Features 3 light modes: steady, fast blinking and slow blinking; Breakaway lanyard/rope included (approx 23l); Light / glow color matches plastic body color; Mini clip at top (like pen clip, 0875l x 016w) and on/off button; Uses 3 button cell batteries (LR44), included, and are replaceable; Glow stick ships with pull-tab battery protector inserted inside slot on barrel above button Tab must be removed before use; Note: This is a novelty item and should not be used in emergency situations; Product Size: 6.75 l x 0.5 dia.