The Gel Strike Glow Tracer Unit fully charges the Glow In The Dark Gel Balls with a beam of blue UV light every time the Rapid Blaster is fired!!! The Glow Tracer Unit lets you see Glowing steams of Gel Balls fly though the night sky or low lit environment. You will no longer need to shine a bright light on the Glow In The Dark Gel Balls before use with the Tracer Unit attached to the blaster.  The Glow Tracer Unit comes with an adapter which attaches to the front of the Storm Rapid Blaster and allows you to easily screw the Tracer Unit onto the front of the Blaster. Once the Tracer Unit has been screwed on the Tracer Unit can be powered on/off with a simple push of a button.  This Glow Tracer Unit is a must have and for anyone that enjoys Blasting Glow Gel Balls at night!!! Features Aluminum Glow Tracer Unit which fully charges Glow Gel Balls with a Blue UV light every time the blaster is fired Works With Official Glow In The Dark Gel Balls LED power on/off button on back of unit Rechargeable Lithium Ion Battery Fully charged battery shoots approximately 15,000 Gel Balls Micro USB Charging Cord  Safety Orange Anodized Color Aluminum Storm Adaptor (Tracer works only with Storm Pistol Blaster) BLASTER NOT INCLUDED!!