Ade Advanced Optics Crusader 8 Reticle Green and Red Dot Reflex Sight with QD Mount, Black 8 Kinds of Reticle 5 adjustable brightness settings. Quick detach pica tinny/weaver mount. 1MOA; Low power consumption for long battery life Quick detach mounting system. Aluminum Body with metal protective shield Unlimited eye relief. Water-resistant and shockproof. Parallax corrected. Wide field of view. Dimension:108x53x62mm. Weight:8.6oz Compatible with magnifiers or NVGs. Clocking Wind age/Elevation adjustments. The Graphic Figure on the manual comes with the product Built-in Rechargeable Battery with Charging indicator light. Light automatically turn off after fully charged. Charging cable included. The universal battery part number is LIR2023