Plastic 【6 Realistic Dog Barking & 11 Voice】Our Alarm has 11 Doorbell Ring chime including 6 barks and 1 alarm, 2 ding dongs, 1 melody, 1 welcoming. You could set the proper voice according to music buttons. The alarm's realistic dog barks are recorded from real dogs, ensuring a believable deterrent to would-be intruders, and against squirrels, raccoons, boars, foxes, and other critters. Enhancing the security of your home or business. 【110dB Loud & Adjustable Volume】Up to 110dB alerts with 4 good volume levels. The motion sensors activated speakers loud enough to scare off intruders. Never have to worry about missing a vistor or strangers trespassing. The motion sensors transmitter and bell alarms, great product for home security. 【Long Working Range & Sensitive PIR】Our sensor uses state-of-the-art passive-infrared (PIR) sensor to detect any movement within the detection range. Maximum working range up to 1000 feet between Detectors and receivers at open air area, recommended for 200 meters is better. Infrared sensing distance is 0-7 meters and 110°Horizontal, 30°Vertical. It will allows you a fore warning when guests (or intruders) are approaching and presence. Great for use in your home, yard, garage, gate, pool, and anywhere on your outdoor/indoor property where you wish to sound the alarm. 【USB 5V-Powered / Battery Powered】There are two ways to power this motion sensor door chime: USB cable power and 1.5V alkaline batteries (batteries not included),Receiver requires 4 aa batteries,Detector requires 3 aaa batteries, packaged with a USB cable (Please note that power adapter and battery are not included in the package, you need to buy them by yourself). It is more convenient to use battery to power, without the limit of installation place while working time will be more lasting if using power adapter. 【Wide Rang of Applications】The sensors are super easy to instal, it can be mounted to doors, windows, walls, fence posts, trees, or any other surface, which is great for homes, offices, garages, yard and shopping malls, for full coverage of your property. With waterproof building, It's suitable for indoor/outdoor use; double-sided sticker or screw can be used. Match N chimes with N sensors around your property to differentiate where motion is being detected. S SELDORAUK Security Standalone Effective all-in-one Dog Barking Alarm Motion Detector Outdoor Barking Dog Motion Sensor Alarm Barking Dog Alarm Motion Protect Home. This all-in-one motion sensor door chime, which combines with infrared detection and alarm function, is very popular for its convenience and practicability. 0-7 meters detection distance, 110° horizontal detection angle and 30° vertical detection angle allow you to mount this pir doorbell chime to many places such as home, window,shop, shed, office , garage, warehouse, restaurant, public house etc.Designed with 4-mode switch: volume button, music button, lock/unlock button and SOS call button, this pir motion sensor detector chime alarm is easy to use, when some one passes around to trigger it, it works with rejustable volume sound selectable voice. As a driver of realistic dog to bark the elk and little animal away!keep unwanted away! Like caring with a guard dog As a guardian of home to scare away strangers ,thief,bad element ,Protect your home especial you out of home. Sounds too real will scare the hell out of an intruder.A As an alert motion sensor a good security alarm substitute to send out continous alarming sound like “Wu Wu...”for about 15 seconds;when someone near dangerous zone.extra SOS call for help.E Early detector good to know when someone is coming to your doors,ding......dong..... Welcome visitor door entry chime to say “welcome” Package included: 1 x Wireless motion detector 1 x doorbell chime alarm 1 x USB Cable (recommend for chime alarm) 1 x Double-face tape+Plastic clip 1 x Screws Parts bag(in battery cover of detector) 1 x User manual AC/DC Operated for indoor and outdoor use Note:USB cable 5V for AC power by adapter(Not contain).Recommend receiver use USB Cable DC: Sensor:AAA1.5VX3PCS(Not included) Receiver:AA1.5VX4PCS(Not included)