... .ComponentsPCB, IC, loudspeaker/buzzer, microphone, LED lights, batteries, wire harness, switch, more or less for different items.ICOTP or Mask Rom ... .5V, 750mAh); AAA(1.5V, 300mAh)Switch OptionsPull-tab, press, on/off, vibration, sound sensor, light sensor, motion sensor etcLight Color OptionsRed, yellow, blue, green ...