Features 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 Specifications: Dimensions (L x D): 90mm x 32mmWeight (Without Converter): 71gThread Direction: 14mm CCW/Negative | 11mm CW/Positive (w/ Adapter)Burst Speed: Up to 35PRSCertificates: FCC, CE, and ROHSBattery Specs: Li-Ion, charging time 2.5 hours, last for 20,000 shotsBB Compatibility: Supports green tracer BBs and red tracer bbsPackage Includes: Tracer Unit, 14mm CCW to 11mm CW Threaded Adapter, USB-C Charging Cable, ManualMaterial: Aluminum, PolymerDisclaimer: Do not shine directly into human eyes. Not a toy. Keep away from Children.