Motion Sensor Door Chime Detection Range ✨Applicable To Many Occasions Motion Sensor Alarm Memory Function ✅Easy to Install Door Entry Chime Scalable: The number of receiver's and sensors can be selected for actual needs. By matching the light and bell, each receiver is paired with 32 sensors and 8 remote controls. (Tip: The kit does not include batteries. You need to bring your own alkaline batteries or use USB power supply).
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