I bought the smaller one from Kmart, because I noticed that it mentioned "2x UVC tube lamps" on the box, while the one with the wireless charger did not. It appears yours uses LEDs (which are questionable in effectiveness) instead of tubes. However, I purchased mine not for sanitising my phone, but for use in my electronics hobby - such as for erasing EPROM chips, or exposing photoresist to make homemade circuit boards. For those purposes I think it will be more than adequate, I just have to put up with it talking at me when I use it.