Photocell Doctor Hand Washing Control Circuit The product is specially designed for photocell taps. Can be used for any suitable circuit. In addition to the automatic relay output, there is a manual button output. 2 digit red display. The circuit is set for 50 seconds, adjustable up to 99 seconds. Case Dimension: 3x7x9 cm Our products are our own production and are guaranteed against manufacturing defects for 2 years.