Weekly Timer Astro Digital 230V 16A 2-Channel 2TE Digital Timer Sentron 7LF4 for the time-controlled switching of electrical consumers, e.g., lighting. Siemens digital timers have many and very flexibly adjustable on and off time points. With the separately available USB adapter, programming can be conveniently done on a computer and directly transferred to the timer using a data key. The 7LF4 timers are available in various versions such as Mini, Top, Profi, or Astro with automatic sunset delay control. Timer devices 7LF - Safety, comfort, and energy savings.