Master Lock 4841DATSEN Auto Sentry Wireless Anti-Theft Vehicle Alarm System
Rating:
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- Sales Rank: #190075 in Automotive
- Brand: Master Lock
- Model: 4841DATSEN
- Dimensions: 1.00 pounds
Features
- Detects shock, glass break, and voltage drop, Siren mounts anywhere under the hood with double-sided tape
- Alarm attaches to battery terminal and sensor plugs into VPA or accessory socket
- Protects your vehicle and its contents, pressure sensor detects unauthorized vehicle entry into passenger compartment of cars and trucks
- Installs easily in minutes with no tools or splicing, no wires to cut
- 110 decibel alarm siren and includes 2 fobs
- Detects shock, glass break, and voltage drop, Siren mounts anywhere under the hood with double-sided tape
- Alarm attaches to battery terminal and sensor plugs into VPA or accessory socket
- Protects your vehicle and its contents, pressure sensor detects unauthorized vehicle entry into passenger compartment of cars and trucks
- Installs easily in minutes with no tools or splicing, no wires to cut
- 110 decibel alarm siren and includes 2 fobs
Master Lock 4841DATSEN Auto Sentry Wireless Anti- Theft Vehicle Alarm System is a plug and play alarm system that utilizes sophisticated sensors to detect any unauthorized entry into the passenger cabin and sends a wireless signal to sound a remote alarm mounted in the engine compartment. It provides a visible and audible deterrent to thieves targeting the vehicle itself or any loose valuables inside the vehicle.
Customer Reviews
Most helpful customer reviews
4 of 4 people found the following review helpful.
By H. Guentert
I bought a used 2008 Mercedes GL320 and was highly disappointed to find that it had very little antitheft or anti-vandalism security with no wheel locks or tamper alarm that I can find. For a $70K Sticker Price vehicle with most of all the options including GPS, I had to determine which McGard locks would work even though none were listed, and after evidence of several attempts to break in or steal fuel became worried about parking in unsecure lots and even in my driveway overnight.i went to a well known professional installer and was told that Mercedes are very difficult to install alarm systems on, usually taking abut 6 hours. I was told that Mercedes might have an add on module that allow me to use my current key fob opener. I check with Mercedes and they didn't seem to know what i was taking about, but found a Codalarm unit that was supposed to work (approx $600 installed).I saw this Master Lock and decide to give it a try. It was fairly easy to install even though my battery not under the hood, and although i have to use the extra key remote, it works well in providing an attention getting alarm with any tampering which is what i needed. My vehicle may have been difficult to steal, but now it is also difficult to enter or tamper with even if an expert can bypass my factory security. With about a 20 minute installation, the product is a great, cheap addition without the worry of having your vehicle computer system ruined by a bad installation of a fancier system.I also looked at the Bull Dog systems at a parts store, but they were given poor reviews and have been happy with this model so far.
9 of 12 people found the following review helpful.
By A. Soror
Update 21/04/2012: still gong strong (knock on wood) :)Update 18/07/2010: Replacement still gong strong (knock on wood)Update 16/11/2009: Died in October 2009 for no apparent reason. Luckily enough I got it replaced and will give it a second chance, the new one is working as of November 2009 and I will update the review if anything unaccepted happens.A products that does exactly what its supposed to do. :)I have had it (2-3 months ago), and couldn't be happier.Reasons behind the purchase:------------------------------ I didn't get it to deter any theft attempt, we all know that if any needs to get into a car, he will be in, out and away before the $5xx viper draws enough attention.- Any ways, the reason I bought this was because of a couple "hit and run" I had during the past year, lousy drivers denting/scratching the side of my parked car at the grocery parking lots and just leaves. I installed this for the hope that it draws someones attention just enough to get the plates of the offender.Bang for buck:---------------Even the most basic installation for a conventional alarm, that's without hocking up the windows, power locks or installing a hood/trunk sensor would cost at 2-3 times the price of this unit.If you don't want the car to be driven away, then an immobilizer is the way to go, again costs so much to install. although same company has a brilliant idea about remotely activated starter relay. Master Lock Starter Sentry Vehicle Anti-Theft SystemOh, not to mention the $4 yearly discount on vehicle insurance. ;)Security:----------And for those asking "if someone has broken into your car, what's to stop them from unplugging the sensor and throwing it out the window? Or popping the hood and ripping the alarm away from the battery?"Here is what I think:- Once triggered the siren wouldn't stop without the fob unit unless disconnected from the battery.- This alarm should be triggered by any voltage drop as well.- Can't we make the same "rip the alarm away from the battery" about any other more pricier alarms ?Convenience:-------------If you know the way around your car (that how to connect/disconnect your battery wires) it would take around 10-15 minutes. If its your first time under the hood, I would give it a 30-45 minutes max.Setting Sensitivity:---------------------One more issue is how to set the sensitivity, there is a useless side screw on the sensor, forget about it. The proper method is posted on masterlock's website.Taking the test:----------------I have a Camry'99, which I can claim a bigger than typical car, sensor in the cabin is a pressure sensor, it highly depends on how big is your car. By default it didn't fully work for my Camry (just banging the front doors used to trigger it), after fob sensitivity setting opening my trunk would trigger it.At highest sensitivity setting, I can't even get it to arm if its raining, because the sensor senses the droplets on the body of the car (tells you about how sensitive it is), medium sensitivity should work no problem.Cons:------Why is it losing a star ? first documentation is as good as non existing, especially on how to set the sensitivity. Second, this would be perfect is it was 2 way (fob beeps to let you know alarm was triggered).Final thoughts:----------------This is a variable sensitivity, cabin pressure sensor that lives to the promise. Better know what to expect rather than getting disappointed.
2 of 2 people found the following review helpful.
By Stephen D. Feist
I wanted an alarm for my VW camper and did not want to mess with the wiring harness as I already have wiring problems in the van. I found that for this van (which the battery is under the passenger seat) the alarm installed easy. It seems to work, just not every time. It may be that I have to tune it. For what I got I think this unit is over priced and is a poor value. Still I am semi-satisfied and will keep the unit. I would not recommend this unit to a friend.
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