Specifications:1) Voltage: 1.2V - 3.6V2) Typical operating voltage: 3V or 1.5V 3) Low power consumption4) Melody emitted when opening the card and the LED will flicker5) Proposed operating temperature range: -10 ~ +60C 6) Packing: OPP bag,envelope per pcs 450pcs/ctn carton size:0.098 stere G.W:20kg/ctn N.W:19kg/ctn7)cards features:14.5*21cms(folded size),4 colors printing on both sides,230g artpaper. producing area:China payment:T/T,L/C