2. this product should ensure that not too close to metal . so as not to affect the remote control distance. Avoid installed in the indoor place.

3. this paragraph is an analog signal, 50 meters are used at the same time more than two (including two) may interfere with, some wireless devices may also interfere with, such as wireless router and near the other doorbell.

4. to use high quality alkaline batteries, carbon battery liquid leakage corrosion) to ensure sufficient power.