Up to 110 dB Alarm or ChimeLoud 110 dB alarms help wake/alert homeowner or renter, help deter intruder. | No Wiring NeededWire-free design is easily mounted on windows or doorframes - powered by 4 LR44 batteries (included). | Adjustable VolumeEquipped with 2 adjustable volume levels from 85 dB (mild) to 110 dB (loud) to fit your needs. | Alarm or Chime ModeFeatures an easy-to-use CHIME/ALARM switch to let you choose your preference of alert. |