Deter unwanted guests with the ELRO ARD51 electronic guard dog. If motion is detected within the range of the radar sensor, the alarm signal is triggered as desired. One of the features of the electronic guard dog is a realistic dog barking, so it seems like a real guard dog is on guard. Installing the electronic guard dog is a simple, affordable and durable way to secure your home and belongings. The ELRO ARD51 electronic watchdog has an intelligent sensor that uses radar technology. Thanks to this radar technology, the device detects movement through windows, doors and walls with a thickness of up to 18 centimetres. Radar detection goes through wood, plastic, glass and cement. The range of the radar sensor is adjustable up to a maximum of 16 metres. In addition to the dog barking, you can also opt for a police alarm or a door signal (ding-dong). The volume can be adjusted from 70 to 120 dB (A). This makes the ELRO ARD51 not only suitable for deterrent unwanted visitors, but also for welcoming visitors, e.g. in shops. A guard dog safety sticker is included in the packaging for an additional preventive effect. Stick the sticker in a place that is quickly seen by unwanted guests, for example on your front door. Important product information: Can be used with both batteries (not included) and with the included adapter. Simple, affordable and sustainable way to deter burglary and vandalism. Using radar technology, the device detects movement through walls, doors and windows up to a thickness of 18 cm. The range of the sensor is adjustable from 9 to 16 metres. Three different alarm signals: dog barking, police alarm doorbell (ding-dong). Adjustable volume from 70 to 120 dB (A) with 3D sound effect for more vibrancy. InstallationPosition the ARD51 electronic watchdog in an inconspicuous area near the outer wall or door. The device can be used with an adapter or with batteries. Adjust the sensitivity of the sensor, select an alarm signal and the device is ready to use. Don't forget to apply the included safety sticker to an eye-catching spot near your door! Contents of the packaging ELRO ARD51 electronic guard dog adapter (1.5 m. cable) safety sticker, instruction manual (English language not guaranteed)