... changing for choice3.Power by: CR2032.CE2050 or other button cell battery4.Lifetime:can flash for more than 5000 times or ... more.5.Flashing way:as you require6.Activated by: press button, vibration, motion sensor, PIR sensor ,shake sensor etc.7 ... Option: Pull-tab switch, push button, light,motion, vibration activated the sound9. Battery: 2-4pcs cell battery for different item10. Application: Greeting ...