Heavy-duty， waterproof， 100% brand new & high quality The 110 DBA Siren will be activated when someone tries to unlock move， touch or knock.The alarm sounds in 10 second intervals. The alarm will keep sounding with constant movement or vibration.The batteries are not accessible when the alarm is activated.Ideal for Motorbikes， Sheds， Gates， Caravans， Motorcycles， Ladders， Tool Boxes， Garden Furniture etc.Size: 7x3x10cm (L*W*H)