There are many portable alarm system options in the market today that range from very expensive to very affordable, here are some of the options we have found. Each will obviously give you many different feature sets so please take the time to research the product before you buy it and look for online review from actual users to help you make your decision a good one and not just a waste of money.
Tattletale is a complete alarm system in one compact unit. Just plug it in. There is no installation, no wires and no appointments to schedule.
You own it. You can move it from one location to another at any time.
Tattletale sends an instant wireless signal to 24/7 emergency dispatch. With the addition of long range wireless accessories tattletale can protect anything, anywhere, anytime.
Tattletale uses a wireless data link to send the alarm signal. This signal is a one-way data packet that travels over the digital data control channel of the existing cellular network. There can be no dropped calls!
Thieves typically cut a phone line before entering a premise. Data packet technology is superior to conventional alarm systems because there is no phone line to cut. The digital wireless alarm signal also eliminates the chance that a power surge will cause a false alarm.
Use Tattletale anywhere in the United States and Canada. There are no long distance and no roaming charges.
More Portable and inexpensive solutions – http://www.tbotech.com/homeprotection.htm
Just remember you get what you pay for in many cases, so base your investment in security on the items your are securing.