Loud alarm signal – approx. 110 dB siren. Delay Setting: 10 second delay to enter security code before 110 decibel siren is sounded. After installing the battery, when entering the password and pressing "#" to end, the LED will be lit with a 10 second delay, during which no sensing or alarm work will be done for 10 seconds before entering the standby state.If we enter the password again and press "#" to end, the LED will flash for a few seconds before turning off, and the alert status will be cancelled.