Follow the steps for usage 1 place the correct batteries in the detector in the receiver units2 Make sure that the batteries have been put in the proper positions 3 Mount the detecet properly by the front door window frame driveway walkpath backyard or anywhete you need 4 Then switch on the receiver and adjust the volume to either hi or lo position 5 Now the remote detective system is opetrating with the infrared detect technology6 Plance the receiver in an easy to reach place 7 When the detecet senses motion the receiver will make an audible souned the LED light will flash 8 Please wait for 30seconds after switching on detective receiver to activate 9 Pleasse install both units 3 feet above grornd level for optimal performance Features 1 100 brand new and high quality2 It is used to place this unit on backyard porch garage room baseroom patrol etc3 It detects movements and sends a signal to the receiver from up to 400 feet away4 Alerts you when someone enters your driveway such as visitors vehicles intruders animals or kids coming or going 5 Advanced notice when someone or something enters before they surprise you 6 Scare them away The tune set on high itself can scare unwanted visitors away 7 Use it to monitor any area inside or outside Its wireless so you can place it anywhere in the house and even take it from room to room 8 Will alert business owners working in the back to customers entering their store9 Cordless just turn it on 10 Mot