Need Help! 200mW Green Laser Module

Hi, i was thinking about buying a green 200mW laser module and I'm seeking help. I am new to lasers and if I buy this particular how will i attach a power supply to it? What type of battery is needed for the the module and do I need a host for it?

thank you



link to the laser
laserhttp://www.ebay.ca/itm/200mW-532nm-Solid-Green-Laser-Diode-Module-w-h-Heatsink-/260611008003?pt=LH_DefaultDomain_0&hash=item3cada0 6603#ht_3612wt_986