I have a Nikon D3100. I was told to buy the product listed below. http://www.amazon.com/gp/product/B004SCD7LA I purchased it. However, it does not seem to work with my camera.. I have a feeling it needs an adaptor that does not come with the device. I attempted to attach it directly to the hot shoe and it did not work.I need step by step directions on how to operate the device for my camera (Nikon D3100).

I replaced "Off - Low - Med - High" knob on Maxi Heat oil filled heater Model OH-107c with a Camco 00913 Knob (Purchased at Amazon.com for $7.03 including shipping - http://www.amazon.com/gp/product/B000KKOE4I/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1) - Blue insert fits snug - Had to remove 3 small tabs on cover that are related to 'stops' for original knob. Five minute repair and heater works again. (Side Note: I called manufacturer and they told me the heater had been discontinued for 9 years so they had no parts).

It's safe according to the list at http://www.botzilla.com/photo/strobeVolts.html

There are several brands and styles of under tank heaters to choose from - here are a few options to get you started.

http://www.amazon.com/gp/product/B0002AQCKA/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B0002AQCKA&linkCode=as2&tag=reptilesuppliessquidoo-20

http://www.amazon.com/gp/product/B0002AR2YK/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B0002AR2YK&linkCode=as2&tag=reptilesuppliessquidoo-20

http://www.amazon.com/gp/product/B00164PW7U/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B00164PW7U&linkCode=as2&tag=reptilesuppliessquidoo-20

You can get the manual on the link below scroll down to product detail then click on product manual in blue.

http://www.amazon.com/gp/product/B00005QFL0?ie=UTF8&tag=lyvwel-20&linkCode=as2&camp=1789&creative=390957&creativeASIN=B00005QFL0

Two listings at Amazon New - http://www.amazon.com/gp/offer-listing/B0000C6X1I/ref=dp_olp_new?ie=UTF8&condition=new Used - http://www.amazon.com/gp/offer-listing/B0000C6X1I/ref=dp_olp_used?ie=UTF8&condition=used

Go to www.nikon.com then go to the products & support category, there you can find a downloadable user's manual e-book of the specific model of your digital camera. For your convinience, here's the link http://imaging.nikon.com/products/imaging/lineup/digitalcamera/slr/d3100/index.htm

Link:

http://www.amazon.com/gp/redirect.html?ie=UTF8&location=http%3A%2F%2Fwww.amazon.com%2Fs%3Furl%3Dnode%253D11041791%26field-keywords%3DCasio%2BExilim%2BEX-Z77%26x%3D8%26y%3D19&tag=innerpro-20&linkCode=ur2&camp=1789&creative=9325">ex-z77

http://www.amazon.com/gp/product/B0032GTI9I?ie=UTF8&tag=innerpro-20&linkCode=as2&camp=1789&creative=9325&creativeASIN=B0032GTI9I