K&F Concept-301 16MP 1080P HD Trail Camera 0.4s Trigger Outdoor Waterproof Hunting Infrared Night Vision Mini Camera, 2PCS

SKU: KF35.006V2

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Yes it has a 12 volt power port on the bottom. But it takes a 4.0x1.7mm plug. Most external battery packs are 2.1... I had to get a 2.1mm to 4.0x1.7 adapter from Amazon to use my Stealth Cam 12v solar battery pack. I love it! Radio Shack has them cheaper if you are lucky enough to have one still in your area. 
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I would guess it to be appx 2 feet. 
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Update: For your information, the issue has been fixed 1 year ago. All cameras are equipped with the latest firmware. 
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If you select the loop recording in the settings, even if the SD card is full of the game camera, you can continue to record photos or videos, and then automatically delete the original photos or videos 
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I found a padlock that worked (at a local True Value) and then used a coil to run thru the padlock and around the tree. I use the strap that comes with the camera to fasten the unit snugly to the tree. I leave the coil a little loose so that it hangs below the camera and does not interfere with the lenses or sensor. 
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Currently there is no way to delete seperated pictures on the camera. We will consider this in the future firmware release. To delete all, you can run the "Format SD Card" in the menu settings. 
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I had the same problem trying to view them on a macbook pro. Finally realized the photos are jpg files in a folder on the card, and I can copy them to the hard drive, then add them to photos. Not ideal but at least it works for me. Hope this helps. 
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The camea can take 1.6v rechargeable batteries, but in general rechargeable battery might drop its voltage quick depend on its physical performance. In the cold weather, recommend using Energize lithium batteries to get longer lifetime. 
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Yes and no. Using motion detection it doesn't work through a window. However.... using the timer inside it you can record through a window using it. How? Set the timer to record 4 minutes every 5 minutes for 1-5 hours or whatever time you need it to record for. This is what I do- just make sure you have a SD card with enough memory for the videos- I use a 32 GB SD card, I use it though a window as a security camera for my car....I live in an apartment so I can't hard wire anything and this works great for what it is.