Description PIR Technology: The infrared sensor's detection range is approximately 4-8m (13-26ft), with a maximum working range of 280m (918ft). Place the infrared sensor detector at the entrance, porch, gallery, mailbox, and the receiver inside your home. It will detect motion and send a wireless signal to the receiver, keeping you informed and ensuring security. 5 Modes to Choose From: The receiver features Welcome / Alarm / Doorbell / Color Light and Night Light modes. The Welcome mode offers 5 selectable welcome languages. The Doorbell mode provides 36 ringtones to suit your preferences. The Alarm mode reaches up to 113dB, effectively deterring intruders. The Color Light / Night Light mode is silent, with 4 brightness levels and colors to choose from, making it ideal for individuals with hearing impairments or sleeping babies. Easy to Install: The device can be powered via USB or batteries for optimal performance. Both the infrared sensor and receiver have a mounting base. The infrared sensor rotates 360 degrees left and right and 180 degrees up and down. It's incredibly easy to install and can be rotated to any position you need. More Expansion: Each motion sensor detection alarm receiver can be used with up to 32 motion sensors. The number of transmitters and receivers can be freely selected, matched, and customized with specific lights or ringtones. [Multifunctional Motion Sensor] Wide range of applications. It can be used as a doorbell, caregiver pager, anti-theft alarm, pet monitor, mailbox alarm, store welcome doorbell, and is suitable for homes, hotels, offices, warehouses, office buildings, etc.