... )With a manual button on panel3)The control box concealed in wall, elegant panel appearance ... is an extra manual button ,it can control the solenoid valve. If the sensor is ... Intelligent flush, hygenic , water save, power -save ,Flow rate adjustable ,Trap seal protection....etc. 4.Material: ... 4. Convenient to maintenance: its build-in flow controller and filter make the maintenance easy. 5. Intelligent ...