1. Larger measurement range.
2. Single button to finish learning setting.
3. Normally close and normally open can be exchanged.
4. Easy to install.
Installation & Usage:
2. Function operation：
2.1. Quick setting：Press the SET button for less then two seconds to finish quick setting.
2.2. Middle valve setting：Press the SET button for two to five seconds to finish setting valve A；
Press the SET button again to finish setting valve B.
2.3. N.O./N.C. switch：Press the SET button for six to ten secondsto finish N.O./N.C. switching.
2.4. Lock/Unlock switch：Press the SET button for eleven to twenty secondsto finish Lock/Unlock switching.
2.5. Factory-fresh state：Press the SET button for over twenty seconds to return factory-fresh state.
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