The products are designed for photochromic lens test.
Put lens inside the machine after power on to make it work. Light on when lens inside; light off when lens outside. It will go off automatically after 240S.
Timing function: Screen will show 30s, 60s, 90s,120s,150s,180s, circularly for non-stop press after lens inside; Screen will show count down time until 0 then off finally if time chosen.
The machine will work with weaken brightness for long press on screen for 2s; pressing 2s again to recover in normal model.
LED light will go off automatically then closed finally after 2s if lens removing.
