1. Distance Adjusted Automatically: Plug in, and after forty seconds, lights blink that showing start to work . The set  will directly going to the work state if it not induce the obstruction in twelve seconds. If exit the obstruction,  the light will always brighten up and the set can automatically adjust the distance as per the obstruction position in 12 seconds. Adjust over, the light will only blink 2 seconds for notice. 
2. Work Process: The water will come out automatically when hands in sense  range and hands away, the set will stop to make the water out. Pls notice to make error operation because of obstruction in sense range. The set will automatically stop the water when continuously exceed 1 minute.
3. Sense Distance Adjusted: The default of sense distance is 30cm.It can be  discretionarily adjusted from 20cm to 40cm. (the sense distance here is based  on the paper of 25cm*25cm as baffle-board) 
4. Filter device :it can clean the filter anytime to prevent jamming 
5. Ups power (If choose the AC /DC as the power provide): If the unit using AC power, DC mode is standby .when the AC is turn off, The power provide mode will change to DC automatically.
6. Low Voltage Alarm: When the battery voltage is too low(lower than 4.6v), battery indicating light will flashing one time every 3 sec. If not to replace batteries, the sensor will stop work.
7. Sanitary : The turn on-off actions are completed automatically by the unit, no  need to touch faucet, It can avoid the crossed infection of bacteria effectively.
8. Electricity Saving( DC products): if use 4"AA"size alkaline batteries, using 3000 times/l month, it can be used at least 1 year