store owners during the day, anti-theft protection at night, door blade L / welcome / doorbell / alarm / colorful light / 5 in 1 multi-function lighting Transmission range up to 280 m in open space 8 chord music chip, horn 40mm, 36 chime melodies Remember your last melody and volume set when you turn it off Multi-color LED lights, adjustable brightness, different inputs by different colors 4 adjustable volume levels (loud/loud/medium/low) from 113 to 25 dB Ideal for Announcing Visitors. 5 welcome languages to choose from. As soon as someone approaches your front door to sound an alarm, the sound you selected will be sent. Provide security to your home. When you sleep dead, you will be woken up when someone is near the motion sensor. At night, it can be activated in alarm mode to protect your property. Never Miss Visitors. There are 36 ringtones and 4 adjustable volume levels for a volume range of 25 to 113 dB, ideal for people with hearing impairments. Multiple ringtones can be set for