The operation is much easier than it sounds in the instructions. The symbols on the display are self-explanatory. For one or the other function (Volume on / off, calibration ...) you have to know exactly when you how long to press the a button. The manual is particularly important in order to understand the operation of the fine detection that automatically starts to operate the device after the rough measurement has knocked out. In addition, the wall contact to the lower sensors of the equipment shall be given in guiding on the wall - all explained in the manual.
Sorry Bosch: I can see no point in buying the more expensive brother this device, because what that thing can must nähmlich to locate as accurately as possible, it does really well.
Hope this review helps you with your purchase decision!)