Upgrade your Compustar RS1B-DC3, RS1B-AL, CS4905S-KIT, CSX4905S-KIT or RSG6-AL to a full featured vehicle security system with the FT-ALARMIT-KIT.
Q: What type of siren does this kit include?
A: The kit includes a high-decibel 6-tone siren to deter intruders and alert those nearby.
Q: What does the glass break sensor do?
A: The glass break sensor detects glass breakage, which is important in smash-and-grab situations.
Q: Does this kit include an impact sensor, and if so, what kind?
A: Yes, it features a dual-stage impact sensor with a pre-warm alert and a full-stage alert, both independently adjustable.
Q: What is the purpose of the E-Lock Relay in this kit?
A: The E-Lock Relay acts as a starter-kill relay, preventing your vehicle from being driven while the security system is armed.
Q: How does the tilt sensor enhance security?
A: The tilt sensor is ideal for aftermarket wheel security, triggering the alarm if your vehicle is tilted while armed.
Q: How much to install alarm system
A: Do you already have the system installed? This is just the siren. Best Buy won’t charge for install as long as you already have the remote system installed. My local Best Buy is installing my entire system for free after buying from them. My system includes: compustar cs4905s kit, compustar pro t13 remote upgrade kit, siren, and DroneMobile.
Q: Does this have an option to lock and unlock your doors ?
A: No.. its only a security add on kit
Q: Will this alarm prevent Catylatic converter theft?
A: I don’t know for sure, but it’s possible if they bumped into the vehicle or disturbed it enough in the attempt to remove the converter. Mine is sensitive enough that a cat jumped onto the vehicle from a fence and set it off. I would recommend the alarm. Not sure cats would recommend it.

Upgrade your Compustar RS1B-DC3, RS1B-AL, CS4905S-KIT, CSX4905S-KIT or RSG6-AL to a full featured vehicle security system with the FT-ALARMIT-KIT.

Protect your vehicle from theft with this Directed DS4+ security kit. It includes a six-tone mini siren that audibly alerts you when someone tries to break into your car, and the shock/tilt sensor activates the alarm and acts as a deterrent for potential intruders. This Directed DS4+ security kit works with existing remote start systems for full security protection.

Start, Control, and Locate Your Car From Virtually Anywhere. Viper SmartStart Pro is the fastest connected car solution available. Location and speed tracking enable monitoring where the car is for appropriate intervention. The keyless entry feature lets you open your car without fumbling through your pockets for keys. This Viper SmartStart Pro GPS module is optimized for use with Viper DS4/DS4+ systems.

Protect your vehicle with state-of-the-art vehicle security - Factory security systems are not enough! Ensure your vehicle and contents are protected with a 6-Tone Siren, Starter Interrupt, Shock Sensor, Entry-Point Monitoring, Keyless Entry, and more.
| Pros for Compustar - Vehicle Alarm Add-on Kit for Remote Start Systems - Black/Gray | |||
|---|---|---|---|
| Remote Start, Alarm, Security, Quality, Range | Remote Start, Security, Alarm, Loudness, Price | Remote Start, Security, GPS, Overall Performance, Installation | There were no pros for this product— |
| Cons for Compustar - Vehicle Alarm Add-on Kit for Remote Start Systems - Black/Gray | |||
| Compatibility, Loudness | Compatibility | Functionality | There were no cons for this product— |
Customers enjoy the Vehicle Security Add-on Kit for Remote Start Systems, especially the remote start and alarm features. Many appreciate the overall quality, security, and range of the system. However, some customers have noted concerns about the loudness and compatibility with certain vehicles.
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
Added to my Auto start. Great way to get a 2-way alarm and auto start. Pair with a Q9 remote. Very happy. Buy during a sale for best value.
Posted by GrahamR
Amazing product and so convenient. Good peace of mind thar i recommend!
Posted by HunterP
Posted a premature 5 star review on compu junk item already but bbuy won’t let me update review on that 2 way drone remote system…. POOR QUALITY HARDWARE BUYER BEWARE! The Installation on this item was impeccably done by the Bestbuy team at my location… Unfortunately the CompuStar brand hardware build quality is poor at best. Software is awesome and all of the options are amazing… But when the hardware fails… It’s completely useless and leaves your vehicle vulnerable. I paid a lot of money for the system and I’ve always used viper systems in all of my vehicles. The viper systems and hardware ARE FAR superior to the CompuStar brand. I am now facing having to have the system uninstalled, I am outside of my 60 day total tech plus return window by a few days. Not that that matters as the Best Buy stores don’t have anything in stock and you have to order it from them and wait for it anyhow. Total tech plus is only as good as the store that provides it! I have had the Viper 2 way remote in my work vehicle for over three years and it’s NEVER FAILED & the hardware still works like it did the first day it was installed. In comparison the CompuStar hardware, namely the 2 way Drone Key fob Has a horrible build quality, the plastic screen is cracked already, the battery does not last long, the horn for the alarm system sounds muffled already, I am very dissatisfied and “upset” that I now have to have it uninstalled, order more items that will not be available at my Best Buy store, spend additional monies & time & not to mention damage to my wiring system on my vehicle by uninstalling this and installing another system just to get what I paid for in the first place. Will never Reccomend CrapuStar products to ANYONE. This system was installed on my personal vehicle which does not get used as much as my work vehicle just to give a comparison of how much less the system has been used over the past couple of months in comparison to a similar 2 way system in my work truck that gets used and abused DAILY. The viper system that has lasted over three years and never failed but unfortunately doesn’t have all the great software this system offers. Don’t waste your time with this junk. Buy a viper system
Posted by Munch