You can turn your ARCHOS Hello into a surveillance camera. 
You have to use the same Google account on both devices.
Make sure the two devices are connected to Internet.
Make sure the camera is not shut.

1. From the device's homescreen, select the Cawice app.
2. On the Cawice homescreen, select Surveillance camera.
3. Authorize the displayed requests to allow a good functioning of the the app.
   
4. On an other compatible device, download the Cawice app from the application store.
5. Open the app and select Monitor. 
   
   Wait while the two devices are being connected.