I can say this is very the best Nixie Tube Clock ever met. I did not expect and imagine the function of human detection by pyroelectric sensor and IR remote control!!! The Nixie tube display can be off by the human detection function when no one is not front of it, which will greatly contribute to longer Nixie tube lifetime. Roulette displaying is also very fun to see. This is my third Nixie tube clock and I can assert this is the best!!