Product DescriptionParametersFrequency: 433 MhzTransmission Distance: 280M (Open Area)Pir Sensor Angle: 100 Degrees ( Horizontal) And 15 Degrees (Vertical)Sensor Range: 2~8MVolume: 4 LevelBrightness: 4 LevelPower Source Receiver : 3 * Aa Batteries (Not Included) Or Usb 2.0 Micro-B (Not Included) Motion Sensor: 2 * Aaa Batteries (Not Included) Or Usb 2.0 Micro-B (Not Included)Welcome Mode When Customers Pass, The Doorbell Receiver Plays The Welcome Song To Remind You. This Mode Is Suitable For Stores, Grocery Stores And Small Businesses.Doorbell When Friends Or Families Come To Visit; When Your Parcel At; Take Away Arrives, You Will Receive A Prompt Message Even If You Are On The 2Nd Or 3Rd Floor. To Entrance To A Home, Store, Small Business, Barn, Factory, Or Other Building, The Receiver Is In Anti-Theft Mode. Night Falls, Once Triggered By Unwanted Guests, An Audible Alarm Will Quickly Notify You.Colorful Light And Night Light Mode S Having Carried Out Overtime, A Soft Light Will Give You The Reminder Prompt. To Protect You From Theft, You Can Choose The Night Light Instead Of The Sound Alarm As Your Early Warning.Easy Installation For The Motion Sensor, Use Tape Or 2 Screws In The Package To Fix It At The Entrances Of The Porch, Shop, Office, Factory, Garage Or Any Other Places. For The Wireless Receiver, Simply Place It On Your Desk Or At Home. Proximity From Your Place. Attention, Please: 1) Test The Alarm Kit Before Fitting Them. 2) To Avoid False Alarms, Install The Sensor Outside A Place To Shelter From Sun, Rain Or Strong Wind. 3) If Used As A Voice Box Reminder, The Wireless Signal Transmission Distance Will Be Reduced If The Voice Box Is Made Of Metal. 4) After Climbing The Sensor, Please Adjust Its Angles To Get Wide And Correct Detecting Range.Read MoreAdditional Accessories Are Available According To Your Actual Demand, You Can Order Additional Motion Detectors, Door Detectors If You Have More Than One Zone; To Monitor Or To Protect.Ap02 And Ap03 Infrared Motion Sensors Are Available.Ap04 Door Window Sensor Is Available.Ar03 Remote Control Is Available. Just Search "Mengshen + Model Number", For Example, "Mengshen Ar03", To Order Them. Be Paired With The Receiver Before Use, For The Steps, Refer To Their Description.Read MoreMotorcycle Bike AlarmDoor Window AlarmDoor Window AlarmKit AlarmAlarm KitAlarm KitArticle NumberZ08 M64 M70 Ak02 Ak01 Ak03Sensor TypeVibration, Motion Door Open/Closed Door Open/Closed Motion Sensor Door Open/Closed Motion Sensor, Door Open/ClosedApply ForBike/Motorcycle/Car /Scooter Door Window Door Window Door/Window/Porch/Entrance/Garage Door Window Door/Window/Porch/Entry/Garage, Door WindowRemote Control IncludedYes Yes Yes Yes Yes Yes