a.colors;red/yellow/violet/green material:HIPS b.slide switching contral:4.5V battery vcc, useing the superelevation brightness LED for projective light sourse c.different logo can be made by customers' request d.accommodation:product good for advertising decordation,focus promotional lighting,children toy,flexibilty lighting,multifuction rings,mobilphone pendants,pendants,articals for sale in supermarket,articals for sale in vending machine promotive goods,gift item,etc. e.bulk price according to the QYT,SUNFOX,PRICERITE! f.size:44mm*12mm,unit weight;5.4g g.if the customer needs special packing just pay for the extra packing material expense