I was spending a couple of hours to get to know difference between those 3 items, could you help me to choose the right one for a timelapse photography? Pixel tw-283 S2 Wireless Shutter Release Timer Remote Control PIXEL FSK 2.4GHz Wireless Shutter Remote Release Control AODELAN WTR2 Camera Wireless Shutter Release Timer Remote Control Also I don't get it why AODELAN WTR2 cost double price in comparison with other 2 options from PIXEL? I watched this video by Mark Galer and I don't get it what does it mean IF signal? Can I do the same what he showed on the video with AODELAN WTR2 on my Sony A7ii? Thank you!