WIDE DETECT RANGE: up to 600 feet door/window open chime kit, completely cover your ideal detection range when you use it on your house or store, it will alarm immediately when the chime sensor separate over 0.4inch, so notes that the door sensor chime should be installed within 0.4inch gabUP TO 62 RINGTONES CHOICE: it includes the pop songs in us, like” sugar”,” Billie Jean”,doorbell Dingdon ,Dog Barking etc., just chose your favorite one by the doorbell ring receiver,the led will flash when the music alarm, the ring volume has 5 levels to meet your needs at different time&places. smart memory: the door alarm receiver will keep the previous setting while plug in again20 DOORCHIME SENSOR EXPANDABLE: either the receiver can be paired up to 20 chime sensors, or 1 door sensors can be paired up to 20 receivers.It is an adorable choice setting for the kids’ door, pets’ gate, roof window. (by adding new sensors, you can also pair different ringtone to each sensor, so that you can realize exactly which door is triggered)EASY TO INSTALL: the doorbell chime kits have been paired before leaving the factory. just plug receive in an outlet, remove the sensor insulator, you can either use the double sides adhesive tape to stick or use the screw mounted to install on the door or windowOVER 1-YEAR QUALITY ASSURANCE: items we offer 12 months replacements service, any defective parts just contact us for free replacements and we provide 30 days money back,24 hours customer service to reach your 100% satisfaction. Product Description Item type Kit with 2 sensor doorbell kit with 1 sensor 3 sensor kit sensor receiver kit with 1 sensor Pairing Statue Paired Paired need to paire with extra sensor need to paire need to paire Paired Model dw512+d7X2 MY7+F58 dw512+d7X3 d7 dw512 dw512+d7 Expandable Mute Mode except for the alarm mode or door bell mode, setting the mute mode will be also a comforting way during kids’ sleeping time. Up to 62 Rings 62 ringtones for choice, including pop one“you raise me up “,” moves like jagger”and doorbell “dingdong”,” welcome” on stores, etc. Most of the normal tone like an alarm"wo wo wo" or" Dingdong" will last 5s, some will be 10s+ just select the ideal one if necessary. Up to 120 DB loud audible alarm with 5 levels volume, setting with different volume&music to get idea sound reminding. Sensor Range The doorbell transmitter covers 600ft rage, it is far enough to set chimes on backyard or the roof windows in our family. Battery Life 1 sensor can trigger more than 15,000 times,it is far enough for normal usage in our space. Low Battery Reminding The chime sensor led turns red every 3 seconds to indicate a low battery. Pay attention to replace the battery. LED Indicator Led keep flashing while it gets the door sensor signal. make it easy for notice. Notes Doorbell chime only activated within 0.4in.pls keep your mind the gap between the sensor and magnetic stripe should not exceed 0.4in at the door closing Sensor Installation Double sides adhesive&screw mounted for sensor chimes, be note: try not to install on metal, which makes door chime magnetism weaken.