I recently purchased one of these, but in black. The fitting instructions, at first, appeared daunting but I quickly realised that much of it was a duplicate in several other languages. For me this is always reassuring as it suggests that the product is being successfully sold in many countries around the world.
All necessary fitments, screws rawlplugs and grommets come supplied with the sensor and the elecrical connections that are required are very easy to do. Once installed the sensor can be set to allow a 'walking' test under normal daylight conditions, so that you may make adjustments of angle etc., to ensure that the sensor is detecting motion in the full area you wish to protect.
This is a very effective sensor, yet inexpensive. I have no reservations in rating it with five stars and recommending it to all who may be viewing it.