Z-Bolt Premium Green Laser PointerPersonalized Emerald Green Laser Pointer.The BTG-6-P includes our special APC control circuit for power output stability. The computerized APC diode drivecircuit features "Automatic Power Control". The APC circuit is based on a photo diode feedback loop. The photo diodemonitors the optical output and provides a control signal for the laser diode, helping to maintain the diode operation at aconstant optical output level. The circuit adds to the lifetime of the laser, prevents overheating, and provides overallpower output stability & efficiency.Remove Cap Switch. Insert two AAA batteries (+) Tip toward cap. Replace Cap. Do not attempt to remove aperture; voids warranty.Box Contents - Features:Jet Black Finish; Engraves in Vibrant Gold (Brass Casing)98% IR Filtering & Glass Focusing Lens (Not Plastic)Free Lanyard & Accessory End CapSpecial Design APC Control CircuitPower Source - 2 pcs AAA AlkalineUser Guide & Specification CardLaser Power Output CertificateStained Hardwood Carry CaseLaser Specifications:Length 5.83 in. x Diameter 0.51 in. ( 148 mm x 13 mm )Wavelength (Color) - 532 nm (Emerald Green)Output Power - Z-Bolt Certified 4.0 ~ 5.0 mWDiode Operating Life - 3,000 to 5,000 hoursDiode Circuit Type - Computerized APCBeam Diameter at Source - 1.1 mmOutput Mode - Constant WaveRange ( Night ) - 5 MilesFDA Safety Class - IIIaANSI Safety Class - 3RManufacturer's Warranty - 1 YearEngraving and Ordering Information:Laser product is laser engraved in-houseEngraving shows a brass/gold colorEngraving never fades or wears offGift box and batteries are includedCan be engraved rush in 1 day ( upgrade)Standard text engraving is free, engraves gold. Other engraving options, logo engraving is hereFrequently Asked questions, order details and moreNeed to add a logo to your order?