... keychain with flash light or music 2. MaterialIron, ABS, speaker, pcb.3.Process / TechniqueStamping4.ColoringFilled with Soft enamel match Pantone Chart ... size or customizedCover shape: square, round, or customizedInner component: speaker, battery, PCB, ICSpeaker size: 27mm metal availableBattery size: AG13Battery life: 500 times ...