This Motion Sensor Doorbell is a versatile, wire-free solution perfect for businesses, homes, and caregivers. With easy and fast installation, the motion sensor detects movement and sends a signal to the receiver, ensuring quick alerts. The transmission range of up to 918ft allows you to place the sensor at a distance from the receiver, while the detection range of 13-26ft keeps you informed of any activity. Ideal for use in homes with elderly individuals, the receiver can be placed in a separate room for immediate alerts. The door chime features 36 selectable ringtones, from melody sounds to simple buzz tones, catering to different preferences. Additionally, it includes 5 welcome songs, specifically designed for retail businesses. Volume can be adjusted with 4 settings (Loud/High/Middle/Low), ranging from 113-25dB, ensuring it's tailored to your environment. The dual power supply allows for both battery and USB operation, offering flexibility in power options. This sensor chime serves multiple functions, including a door alarm, mailbox alert, retail welcome buzzer, and pet monitor. It is perfect for indoor use, providing a secure environment in homes, businesses, or caregiving settings. Its simple, effective design makes it a reliable choice for keeping spaces safe and monitored.