Style A—Style A should have the same consumption rate (water per flush) as your toilet or urinal.

Style B—Style B should have the same consumption rate (water per flush) as your urinal. These are powered by a solar cell, but they also have a backup battery to ensure you can flush repeatedly. The solar cell uses artificial light to generate power, even if the lights only turn on when the room is occupied, which extends the battery life. These converters connect to your phone via Bluetooth to set the sensor distance and check the battery strength. To prevent bacteria growth in rarely used toilets, you can also schedule flushes at set intervals. Download a free app and stand within sight of a converter to connect to your phone.