MAYMOC Green Laser Pointer Presenter Pen Aiming Sight laser sight Dot Scope with Ajustable Bracket 11MM, 20MM Lightweight and compact Power: under 5mW, Non handheld Class 3R lasersBracket 11mm,21mm. Green day as 30-100 meters to1000 meters at night Tube clip barrel mount fits for 10-23mm tube. Through the button type switch one, Rat tail switch a. The 1 charger, 2pc rechargeable lithium battery(15270 rechargeable lithium battery )