1.Identify day and night automatically. Can adjust ambient light according to your desire : when turn to SUN (max), it work in the daytime and at night. When turn to MOON (min),it only work under less than 3LUX circumstance. As for Adjustment, please refer to in way. 2.Time-delay is added continually : when it receives the second induction signal after the first inductor, it compute time once more on the rest of the first time-delay basic (Set time) . 3.Time-delay adjustment : it can be set according to your desire. The minimum is 10 +/- 3 sec; the maximum is 7 +/- 2min., Weight: 0.22707612986 Pounds, Manufacturer: Jaywool