Bifrost muzzle flame effect Customized flame colors on AceSoft APP Chronograph and tracer function combos Rechargeable built in Lithium Polymer battery with fast charging USB-C port Auto shutoff after idling for 2 hours Comes with a 14mm CCW to 11mm CW adapter Support green tracer BBs, red tracer BBs, and standard BBs Made in Taiwan with FCC, CE, and ROHS certification Manufacturer: AceTech Disclaimer: Do not shine directly into human eyes. Not a toy. Keep away from Children.