Name: Lanyards with solar logo pen   Model: JSL-011Material: AcrylicSpecifications: 13.5x140(L) mm      unit weight: 0.02kgs   Packing: 25pcs/polybag, 500pcs/ctn Cartons Size:  440*240*240mm Brand: JSL Function: 1)Rotatable refill2) the black lead of pen can be changed3) Display LOGO.LOGO will be flashed in the LCD  in a certain rhythm.4)Smooth writing 5)Perfect for your brands promotion, newest promotional gift. Features:  It is the latest solar power promotional gifts in our company ,which is pure green product with no battery needed. Can work in sunlight, light, and every natural light is ok.Besides, this kind of product is waterproof. Any logo and image put into it by some tech, it will be flashed in the LCD  in a certain rhythm ,and be attractive enough. The advertising effect is perfect .The main point: the picture can be changed by simpleoperation, the black lead of pen can be changed and be written fluently.