✅EASY, FAST, WIRE FREE INSTALLATION portable ring chime sensor detects motion-when entering and sends a signal to the receiver ✅SELECTABLE RINGTONES the receiver is a doorbell design with 36 different ringtones from melody sounds to simple basic buzzer for personal preferences and 5 welcome ringtones for retail store ✅ WIDE RANGE The transmission range of the doorbell chime is up to 918ft (the distance from the detector to the receiver) and detection range of the infrared door sensor approximately 13-26ft to keep you informed and safe. You can put the door motion sensor detector in the room of Alzheimer/sleepwalking/ toddler/wandering dementia/ elderly and put the receiver in your house ✅ MULTIPURPOSE motion activated sensor chime,door security burglar alarm for RV van,mailbox alert,entry alert chime for business visitor doorbell,cordless fall and Wander pet cat dog monitor alarm. Fall reminder for the elderly.Indoor use only or protected from rain. ✅Adjustable Volume and Light Mode 4 STAGES ADJUSTABLE VOLUME (Loud/High/Middle/Low ) 113-25dB. Batteries and USB dual power supply Functions -body motion activated- Welcome the guest/customer/visitor in day time when they walk through, anti-thief in the night, prevent the loss of dementia patients,welcome /proximity /motion door alarm / color light etc five reminder, the secret assistant of the boss! - Remote transmission, 280m(918 feet) in an open place, suitable for more places - 8 chord music chip, 40mm big horn, more pleasant, more loudly - Colorful LED lights, brightness can adjust, can use different colors to distinguish different entrances, more intelligently - Independent alarm horn, maximum 113dB, can effectively deter thieves - Volume can adjust, have memory function when change the battery, more considerate and more comfortable - Applicable to all kinds of shops, upscale clubs, hotels, offices, factories, homes, store,garage, supermarket, boutique,door buzzer for business Application: split welcome doorbell, entering alert,sleepwalking alarm, family anti-theft, garage anti-theft, induction doorbell,mailbox chime,censor light and colorful lights,sensor detector, door entry alert chime parts,induction doorbell,nursing homes, alzheimers door alarm,and so on The receiver host can max learning 32 infrade curtain to detect different entrance with its color light to distinguish the entrances Electrical instructions Receiver host using 3 5(AA) alkaline batteries or Micro USB supply power（all not Included）.ks-sf20r wireless noise maker doorbell Infrared curtain using 3 7(AAA) alkaline batteries or Micro USB supply power（all not Included）. Receiver host battery can use for 5 to 7 months (ring 30 times a day). Infrared curtain battery can use for 5 ~ 7 months (detect 30 times a day). alarm system house alarm system apartment motion sensor alarm detector motion detector alarm motion detector indoor interior doorbell burglar deterrent for auto passage alarm motion detector with dog barking rv motion sensor security alarm door security burglar alarm for cargo van Trailer truck