Features:

• Rechargeable MOBILELOCK unit with GPS location tracking plus indoor motion detector with 50 foot range for increased protection
• Anti-theft alarm triggered by motion, vibrations, door contact, temperature changes, or unit tampering
• Alarm notification of up to three people via phone call or e-mail
• Weatherproof, impact resistant, heat resistant, portable, and wireless
• One-year service plan at $19.95/month required for first year

Editor Reviews:

Product Description:
DS510K Indoor Motion Detector Combo Kit includes the DS500 Base Unit above and adds a highly sensitive motion detector, ideal for protecting enclosed areas, trailers, and climate controlled storage

Rating : - Homework
I had assumed Sprint/Nextel were the same in coverage. Not so, you must have Sprint coverage
for the area where you will be using it. I am so disappointed they are not covered by Nextel too.