M5 Wireless Doorbell, Motion Detector with Sound Alarm for Door/Door Entry/Home and Shop/Office, Security Alarm

RELIABLE DOORBELL ALARMS: The wireless doorbell motion detector uses advanced infrared detection technology. The built-in speaker and blue flashing light are suitable for the front door of office, store, restaurant, etc. with a vocal sound/greeting; at the front door of a house, shed, etc. with an alarm sound. When activated, the sound is sent quickly by this small door alarm buzzer.SMART MODE: The wireless motion detector with doorbell is built in three alarm/music/voice modes which can be easily configured according to your needs, the alarm sound of the wireless doorbell continues for 15 seconds in alarm mode.EASY TO INSTALL: The wireless alarm doorbell is equipped with 2 screws and a double-sided adhesive tape for installation according to your preferences.The horizontal detection angle of the alarm detector is 110° and the vertical detection angle is 15°. You can install the wireless alarm bell on the front/rear door. The motion detector of the home alarm doorbell will notify you of the presence of a visitor or intruder when activated. DUAL POWER SUPPLY: The wall-mounted presence detector is externally connected to a DC5V power adapter (not included) and incorporates 3 AAA batteries (not included) to ensure sufficient power. Low battery reminder allows you to change the battery in time without worrying about losing power and missing the alarm.OPERATION DESCRIPTION: Short press the \"VOLUME\" button to change the volume in cycle, i.e. 4-3-2-1-1-2-2-3-4; The host will make a \"Di Di\" sound when switching to maximum or minimum volume.