Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: does this also work like a shutter lock: does it allow for a timed bulb exposure? or do I need a locking cable for that?
Document: It works fine with my 50D & 5D MarII, one is to connect to camera body by cable, it could be also used as wire shutter, plus the second transmitter, a remote control could be done easily, I did try it in 20 yards away successfully.
It doesn't stop at the end of the bracket. Firing single shots is too easy to miscount, especially if exposures are long, and too slow.It seems no wireless trigger short of a Promote or possibly some hybrid arrangement with an Android phone and a wireless adapter (on Canon DSLRs) will be a working alternative. I will also exploring Magic Lantern firmware with may provide the solution.For non-bracketted shooting this remote seems to work like a charm, however.
Pros:1. Excellent performance, you can control your shutter remotely from up to 100 meters.2. Great build quality, it should last for a long time.3. Uses AAA batteries, easier and cheaper to buy. (The batteries last for long time, you maybe need to change it for like every two years)Cons:1. Shutter mode switch is too small, hard to manupulate.2. Better to have an ON/OFF switch on the remote shutter.
I can't figure out how to get it to work. I made sure the batteries were lined up, that they were on the same channel and the cord was hooked up. It says it is compatible with my 5D. The lights light up and everything seems like it will work except it won't trigger the shutter. SO I haven't figured how to get it to work and there is just too much Chinese for the instructions.
I bought this for another camera, an SX50HS. I put together a cable to match the camera.It works well. Functions just like the Canon camera button.Did not try it at 100 meters as I don't think I'll leave my camera that far away from me.You can buy this product on Amazon with the correct cable.
If you need the three pin connector for your camera model ..this isn't the right unit to order ...get the Canon one that includes Pentax!There are two connector formats for the Canon DSLR line, and this product was advertised as : "compatible with Canon EOS 3-pin systems" ...BUT, it is NOT ..it came with the short straight cable (CL-N3) with the proprietary connector, not the 3-pin which I needed for the Pentax cameras.
This remote system is just awesome!It is SO VERY EASY to use. I use mine for both remote shutters and bulb mode and they work flawlessly!I would definitely recommend this over the Canon variant. Price and quality is spot on!
Doesn't just pop in like the transmitter ...need a knife blade or small screwdriver to compress the spring contact.Will see how long the buttons hold out, but considering the price around $20 ..quite a deal.
PROS: The very affordable remote unit performs well enough for triggering the camera, although I haven't tested max range yet.The bulb function is very easy to use, one press to open the shutter and it stays open until you press again.
I saw a Yongnuo 159 remote shutter release for the 7D, which can also be used to start/stop video. It has a similar set up as this device, i.e. it uses an N3 connector to connect to the 7D body, and it comes with a remote transmitter. Has anyone managed to get this to start/stop the video?
Answer: I use a Canon 7D.  This will work using the "B" (bulb) setting.  I've used it for moon shots and infrared exposures - all 10 to 20 second exposures.