... front under the dispenser’s infrared sensor and a preset amount of liquid will spray to your ... . 4. This system software, a built-in correction for long-term stable job, when the battery runs out, ... replace batteries. 5. When the red lights flashing for a long time, please replace the new battery. 6 ... lid, hand battery replacement battery box, pull out a new battery, the battery using 1rd. 7. ...