Features:Includes wireless sensor and wireless receiverIt is good to place this unit on backyard, porch, garage, room, baseroom, patrol etcIt detects movements and sends a signal to the receiver from up to 400 feet awayAlerts you when someone enters your driveway, such as visitors, vehicles, intruders, animals or kids coming or goingAdvanced notice when someone or something enters before they surprise youScare them away The tune set on high itself can scare unwanted visitors awayUse 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 roomWill alert business owners, working in the back, to customers entering their storeCordless, just turn it onMotion activatedWall mountableLow consumptionPlease don't exposure this unit to sun or rain Thank youSpecifications:Transmitter (sensor): 9V battery, receiver: 2 x AA batteries (batteries are not included)Transmitter Size (L x W x H): Approx 90mm x 60mm x 45mmReceiver Size (L x W x H): Approx 90mm x 65mm x 30mmReceiver Switch Setting: High / low volume / offMaterial: PlasticPackage includes:1 x Wireless Detector Alarm (transmitter)1 x Receiver1 x Mounting Swivel Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia