JMDHKK Hidden Camera Detector, Bug Detector, Magnetic Field Detector for Privacy Protection Listing Device in Hotel (Black)

I really like this little alarm/detector. I use it for camping. It has a flashlight, which is useful. The battery is long lasting and rechargeable - but needs an indicator to let you when it needs charging. It has a SOS (or panic) feature on it. You can connect it to Bluetooth on your phone and if the detector gets so far away from your phone, it alarms (not real sure what that’s for, but nice to know if something comes up). I like that it’s small and compact, doesn’t take up much room at all. I can set it right outside the tent while I’m sleeping and if anything gets close to the tent an alarm sounds (which wakes me up and alerts me) and it has a bright light you can set to come on - between the both of these things, alarm and light, an animal will most likely run away (and would definitely startle a person). I feel more secure with this detector - alerts me while giving me time to take control of a potential bad situation.

I got this to add to the front of our tent when we camp and like the added security it offers to alert us of any potential animals getting near our tent at night. (Humans as well.)It’s very small and I’ve been able to keep it on our tent easily although I question the water proof aspects of it. If it were to rain I don’t think I’d have this outside without a tarp over it, which is what we do.The alarm isn’t blaring loud but enough to wake us and at least startle a furry intruder I’m thinking. We dispersed camp in the mountains and do have black bears around. They typically scare easily so this should make them think twice. Again at the least alert us to start making noise and get the bear spray ready as a last resort if warranted.It does seem a tad pricey however, it does offer other options of use that may cater to other peoples situations and concerns such as placing in a suitcase or drawer with valuables, to connect to Bluetooth to use as a tracker of sorts (for sort of a short distance but it is something), as well as using as an SOS alert for emergencies or as a light for nighttime jogging/walking/running. So for all the various options this one little devise offers I’m gonna say the price is probably not so bad.

There's plenty of picture of the outside of this device, so I wanted to show you the inside of the device. My device works pretty well for all alarm functions with the exception of vibration - which doesn't work well on my unit at all - and it definitely should for a $60 price tag.The alarm uses several different sensors to detect, but the most accurate and probably most useful one is the PIR sensor on the front (big white dome). This sensor works very well and was probably worth the price alone in my opinion. The light sensor also works well. The vibration sensor uses a BL-2500N Ultra-small SMT vibration sensor, and this part is supposed to have pretty good sensitivity. In my case, however, the sensor isn't sensitive at all, and I can easily pick the box up flip it over and turn it off before the alarm goes off. Perhaps my vibration sensor is broken or is somehow affected by the white glue that got on it during the assembly process (see pictures).The unit has a 570mAh Li-Ion pouch cell inside, but it is soldered to the mainboard. It should still be easy to replace for those with the right skillset and replacement part.For the size, it's loud and obnoxious, and (mostly) does what it's designed to do. Perhaps I just have a defective vibration sensor? For $60, this should be 100% functional. I feel it's overpriced by about $30 based on what's inside.

This is an easy to deploy proximity/motion detection alarm with a really loud alarm and flashing lights. More than just an alarm, the multi-purpose aspect of this makes it really practical for travel, or keeping in your car as it has a flashlight feature to it as well. I like the bright orange color which makes it easy to spot, and its small size which makes it easy to store out of the way. It charges at an average speed via a nice standard USB-C port, though it has a really long battery life while monitoring an area which is nice.I've found the motion and light detection to be pretty good, and in testing I have never had a false alarm, or conversely not had it go off. On the multi-function topic, other than a flashlight function, you can pair it to your phone and when it is separated far enough it will start going off, a handy feature if you've got a young one might wander off in a crowd at a large fair. It also has a panic alarm mode which isn't activated in the same way as most which rely on pulling a ripcord, and since it has small buttons I could see someone fumbling around while in a panic, so don't buy it for that particular feature. Otherwise everything else is simple to set, just hit the menu button to select a mode, and set it down, after a few seconds it will arm.While it is pretty easy to use, the icons aren't the most obvious, honestly as a recommendation to the manufacturer maybe just use words next time. That being said, once you know what they are operation is simple enough. Turning it on and cycling modes is all through menu button clicking, with the only differences being the flashlight function which you access by holding down the menu button, and the panic mode which has a dedicated button labeled SOS.I feel it is a bit costly for what it is, but it does have really good functionality as a personal space alarm that's easy to deploy, you just have to get past the cost.