Infrared Detection Motion Alarm- Motion Sensor Doorbell no need to ring the doorchime, the PIR motion sensor actively detects the visitors, then the receiver reminds you to the arrival of guests, ideal for homes, store and offices, business.

5-in-1 Door Entry Chime Door Bells- Welcome/Alarm/Doorbell/Mute/Night light mode can be selected, with 36 adjustable Melodies/4 brightness/4 colour/4 volume to meet your different scenario needs.

Long Distance Door Sensor Chime- This Wireless Welcome Doorbell Chime adopts the FM signal scheme, which has strong anti-interference features. The sensing distance can reach 280M in obstacle free environment.

Easy to use&Portability-This door sensor chime has been paired before delivery, no need for wiring, self-adhesive or screw installation,works via USB or battery, angle adjusted to your desired range, ready to go.32 receivers and transmitters can be expandable.

Portability&Memory function Motion Sensor Alarm Indoor-Motion Detector Alarm can be set up almost anywhere and used as a doorbell, caregiver pager, anti-theft alarm, pet monitor, mailbox alarm, store welcome doorbell.Power-off memory,no longer afraid of setting data loss.