thender 0 Posted July 6, 2014 I have read the datasheets and their website, as well as vendor websites. I cannot tell these apart at all. There appears to be one key difference. The 521 is much cheaper. Are there any reasons to buy a 520 over a 521, or would it just be pissing money away? I am looking at a hybrid system of Hikvision DS-2CD2032-I cameras to spot certain areas and GV-FE521 to cover everything. I have lots of small inventory slots and shelves that I want to be able to see, so the 521 would be great for that, with a Hikvision DS-2CD2032-I covering the entrance door and over the cash register and a corner technician's table. Thanks! Share this post Link to post Share on other sites
ssnapier 0 Posted July 8, 2014 I am pretty sure the 520 has some export restrictions. I know the 521 is the one typically sold in the USA. EDIT: Now I am confused because the USA Geovision website shows the 521, but here is the main Geovision page on both: http://www.geovisioncn.com/english/3_4_FE520-521.htm Share this post Link to post Share on other sites
ronwood 0 Posted July 8, 2014 I thought the 520 had a built in microphone and speaker for two-way communication & the 521 only had a microphone (Listening only). But, after looking at the specs they both state, “Built-in microphone and speaker”?? Share this post Link to post Share on other sites