Green laser pen presentation, briefing instructions at any time and conference presentations, teaching lectures, exhibition halls and other purposes, and the writing. Charging Laser Pointer Built-in rechargeable lithium battery,  via MICRO USB slot can be automatically recharged 500 times, long life, with plug and play, no need to worry about battery replacement,  and worry briefing half without electricity annoying.  Flash drive capacity can be customized-made, 4g,8g,16g.... If long time not using, re-charge every 2 months for better use
This product includes 1 year warranty, non-human factors of the damage in the warranty for free repair.