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Customer Review

13 of 13 people found the following review helpful
5.0 out of 5 stars A Modern Marvel of Engineering, July 15, 2014
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This review is from: 1080P Metal Body Car Key Hidden Mini Camera with Night Vision Function (Electronics)
Length:: 0:29 Mins

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Unfortunately Amazon's method of displaying video's compresses the size destroying any full screen display with quality. I was going to delete it but it still displays clarity in the foreground. To the right are two screen captures of the DVR's actual AVI recorded video with the true quality.

Edit 9.13.14 Click on my name to view the excellent screen grabs taken from the AVI file to the left. The Amazon player does not do justice to the quality.

I just received my second KeyChain DVR. It arrived at my California home in 7 days by free shipping USPS as did the first one. It is packaged in a very nice storage box and makes an interesting gift to give away. You do need to purchase and install a micro SD card for the DVR to work.

Edit 9.6.14: The second DVR purchased has two arrows on the fixed marble button, not three as before. The internal software has changed, it does not seem to have continuous motion triggering control mode when used with a USB add-on power supply or the internal software is corrupt. This is a disappointment but I will study it further. I would pay double the price if the DVR had consistent manufacturing quality between units but it does NOT! I have tested five other models and this one can have the best video quality especially in the darker contrast areas.

The sound and picture qualities are CD or better. The AVI files are accessible through a USB cable while charging on the computer. The micro SD card can also be mounted in the adapter sleeve then directly into the computer. After a little practice using the vibrating mode indicator becomes second nature. The night light IR LED's works best for a monochrome recording, like reading a newspaper at 12".

It comes with everything needed including two USB cables. One of the USB cables has a male RCA phono plug so you can watch what's being recorded using the video input on your living room digital TV.

No extra software is used as the DVR has its own internal software/firmware. I use a Class 10-32gb SD card for added benefits. This KeyChain DVR has excellent video when I compared it against my Z12, Z15 and the Brickhouse. The latter three use identical external user feature selecting software which is better but the video quality is not quite as good. When the KeyChain DVR is plugged into a $10 USB 115v wall adapter you can do continuous monitoring in Motion Mode for several weeks with excellent video before the 32gb SD card fills up. With my poor memory it is the perfect way to record notes, I will not leave home without it.
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Showing 1-10 of 31 posts in this discussion
Initial post: Jul 20, 2014 5:21:39 PM PDT
Last edited by the author on Jul 20, 2014 5:23:15 PM PDT
jamazonian says:
The specifications for this product state "Storage support: built-in Micro SD (TF), max 16GB "

You say you are using a 32 gb card.

You also mention motion detection.

The specifications do not mention motion detection.

Does the manual state differently?

In reply to an earlier post on Jul 27, 2014 10:00:20 AM PDT
Last edited by the author on Aug 4, 2014 7:23:51 PM PDT
Christopher says:
Yes, I am using a 32 gb Class 10 SD card. This is way too much memory for the battery life of the DVR but I create extra folders using the extra space for file storage of what I want to keep before editing. Makes my first computer 40 Meg hard drive look silly.

Note: SD cards mostly come Formatted, do not do FULL re-Formats or it could introduce Format corruption. A slow Full format through the USB cable, card in DVR, might fix this, it takes several hours. (32gb = 8 hours) I had good success implementing HPUSBDisk.exe on a corrupted Format, find it on-line. My system is Windows 8.1

If you are NEW to this DVR focus on paragraph 4 in the pamphlet. Using only the un-Locked logo button records good video. One press - buzz - boots it up, wait for 3-sec buzz -, you are now in standby(solid red blinking), pressing it again - 1-sec buzz - recording starts. Press again - 1-sec buzz - to go back to standby (solid red blinking). One long press turns the DVR off - 3 sec buzz -. This is all done on the single un-Locked button. This feature gives you a 5-minute window or file.

Don't forget to click the YES button to the right.

In reply to an earlier post on Jul 28, 2014 1:33:09 PM PDT
Last edited by the author on Jul 28, 2014 1:37:48 PM PDT
jamazonian says:
Thank you very much for your excellent response.

I got one with the 32 GB SanDisk Class 10.

The frame rate is 18 fps. Do you have the same results? Or, do you obtain the claimed 30 fps?

Also, regarding motion detection; have you used it successfully? Does it start recording if there is shadow movement against a wall?

Night vision (low-light) gives a saturated pixel kind of look that goes in and out. Probably because of the lower frame rate? How is your night vision experience?

In reply to an earlier post on Jul 29, 2014 2:13:52 PM PDT
Last edited by the author on Aug 4, 2014 7:25:35 PM PDT
Christopher says:
My Key Chain DVR - FPS = 21.713 - Resolution = 1920x1080 - KBPS = 16,844 -

Motion Detection: To trigger the DVR you want to have good light level shifts, up or down. Someone entering a room is not going to be reliable. What works best is turning the lights on before entering a room. The DVR starts recording within a second from standby Mode.

The nice thing about motion control Mode the unit continues to record 3-minute files until the battery/power runs out, not the normal hand-held 5-minute AVI file then shut off. The unit returns to active-standby after recording a 3-minute file if there are no more light shifts.

"USB Powered" Key Chain DVR Motion Detection will give weeks of continuous recording, 3-minute files, using a 32gb SD mini card. If requested I will explain the steps to get this approach to work successfully.

In the Wild I secure the DVR to the top of my walking stick for normal video recording, the camera needs good light and steadiness for the best results. I can feel the Mode vibrations through the stick/cane.

Night Vision: using the IR LED's for me has a usable range of 6" to 18". The result is a purplish monochrome effect. It can see better than a human in total darkness, the indicator LED's on the side can be used like a tiny flashlight. Pressing the car logo button turns on a yellow indicator LED when in IR mode. The image is reasonably clear but I would use this approach as a last resort. For better results use a pocket white "LED" Penlight while in IR Mode, good "color" and life returns to the recorded image. -

It is remarkable how well thought out this DVR is, I do not own a cellphone (strange) so this as a camera on the go is perfect. I ramble a lot because I teach electronic project building on-line, as a teacher I have learned "it is better to over-explain than re-explain".

Don't forget to click the YES button to the right.

Posted on Aug 2, 2014 1:33:53 PM PDT
Christopher says:
Time Stamp: The Key Chain DVR does not use added software; it is all built into the unit. To change the time on the videos follow these instructions. Create a New text file in the root directory of the SD card. Name it TIMERSET.TXT Place this date code in the text file=> 20140802105500 Y

2014= Year 08= month 02= day 10=hour 55= minute 00= sec Y display time or N no time displayed.

Unplug the USB cable from the DVR; wait 15 sec for shut down 3-sec buzz. Press the un-Lock logo key, the system now boots up copying in the text file then deleting it, wait 3-sec for the ready buzz, blinking solid red. Press the un-Lock logo key to start recording a properly time stamped recording.

I like saving a copy of TIMERSET.TXT in the DCIM folder on the DVR SD card so I don't have to reconstruct it every time I need to reset the clock in the future.

Don't forget to click the YES button to the right.

In reply to an earlier post on Aug 20, 2014 5:55:30 PM PDT
You say to "Create a New text file in the root directory of the SD card".....I do not know what a root directory is.....can you spell this out step by step?....thanks.

In reply to an earlier post on Aug 20, 2014 6:41:31 PM PDT
Christopher says:
Hello Real,

That is a good question, as I always say once someone has the answers everything becomes easy. When you look at the SD card in the computer or through the USB cable, which I prefer, you should see the folder named DCIM where all the recorded files are stored in the 100DSCIM folder. When you see this DCIM folder you are in the root directory, "do not" click on the DCIM folder. Create the text file with the time code here. I am hoping to post a time stamped 100 meg video of the quality of this Key Chain DVR this weekend so check back.

In reply to an earlier post on Aug 20, 2014 7:50:32 PM PDT
I have done what you said precisely three times and the date does not change. One thing you said: wait 15 sec for shut down 3-sec buzz....I do not get this when I unplug the usb cable from the dvr.....nothing happens, and when I record a video, the date is unchanged.....can you help me????

In reply to an earlier post on Aug 20, 2014 9:48:16 PM PDT
Last edited by the author on Aug 20, 2014 9:53:01 PM PDT
Christopher says:
Hello real,

Create a text file in the root directory. Name it TIMERSET.TXT Place this date code in the text file=> 20140821230000 Y
Do not have any extra spaces in the text file. This will make the time 23:00:00 and the date 8.21.2014
If the DVR recognizes it the file will load, then it is erased. Is your file attempt being erased which is a good indicator?
You want the DVR turned off, then turn it on by pressing the un-locked logo button, this is when the time file will load.
There are many features to be discovered, so keep trying.

In reply to an earlier post on Aug 21, 2014 6:11:22 AM PDT
The only space is between the last digit and the Y. The file is not being erased. Also, there is no "shut down 3-sec buzz" when the camera is disconnect from the computer. I appreciate your help....would like to be able to do this. Thanks for your patience.
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